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tilde-train.py
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tilde-train.py
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#!/usr/bin/env python3
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## _ _ _ _ _ _
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## | |_(_) |__| |___ | |_ _ _ __ _(_)_ _
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## | _| | / _` / -_)| _| '_/ _` | | ' \
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## \__|_|_\__,_\___(_)__|_| \__,_|_|_||_|
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##
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## tilde.train is an instance of TerminalTrain. It was originally developed
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## by cmccabe on tilde.town (https://tildegit.org/cmccabe/TerminalTrain) but is now
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## maintained by vilmibm.
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##
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## If you want to contribute code improvements, create a pull request here:
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## https://git.tilde.town/vilmibm/tilde-train
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##
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## -----------------
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##
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## WHAT IS IT?
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## like sl (the ls typo prank), but each car on the train is a x*y character ascii art
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## produced by tilde.town.
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##
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## ( original sl source code of sl? https://github.com/mtoyoda/sl )
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##
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## TODO:
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## * loosen the restriction on allowable characters in train cars. right now, limited
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## to characters in python's string.printable list.
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## * turn main loop into a function, so cmd line arg reader can call it (with -p) and quit.
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## * figure out why tilde.train doesn't work in some terminals (sthg sthg unicode...)
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## * BUGFIX-1 - something about inclusion default cars adding extra "links" to the train.
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## * the -p (print train) option should print all cars, not limited to the max_cars value.
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## * related to BUGFIX-1, that seems to impact spacers (links) between cars.
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## * allow users to create multiple frames so their cars can be animated (difficulty=med+)
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## * allow user configurable speed and number of train cars
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## * allow users to move the train up or down with arrow keys
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## -- worked with asciimatics, but python curses blocks on getch()
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##
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# _ _ _ _ _ _
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# | |_(_) |__| |___ | |_ _ _ __ _(_)_ _
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# | _| | / _` / -_)| _| '_/ _` | | ' \
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# \__|_|_\__,_\___(_)__|_| \__,_|_|_||_|
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#
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# tilde.train is an instance of TerminalTrain. It was originally developed
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# by cmccabe on tilde.town (https://tildegit.org/cmccabe/TerminalTrain) but is now
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# maintained by vilmibm.
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#
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# If you want to contribute code improvements, create a pull request here:
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# https://git.tilde.town/vilmibm/tilde-train
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#
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# -----------------
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#
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# WHAT IS IT?
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# like sl (the ls typo prank), but each car on the train is a x*y character ascii art
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# produced by tilde.town.
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#
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# ( original sl source code of sl? https://github.com/mtoyoda/sl )
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#
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# TODO:
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# * loosen the restriction on allowable characters in train cars. right now, limited
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# to characters in python's string.printable list.
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# * turn main loop into a function, so cmd line arg reader can call it (with -p) and quit.
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# * figure out why tilde.train doesn't work in some terminals (sthg sthg unicode...)
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# * BUGFIX-1 - something about inclusion default cars adding extra "links" to the train.
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# * the -p (print train) option should print all cars, not limited to the max_cars value.
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# * related to BUGFIX-1, that seems to impact spacers (links) between cars.
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# * allow users to create multiple frames so their cars can be animated (difficulty=med+)
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# * allow user configurable speed and number of train cars
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# * allow users to move the train up or down with arrow keys
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# -- worked with asciimatics, but python curses blocks on getch()
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#
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from random import shuffle ## allowing us to randomize selection of cars.
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import glob ## allowing us to search the file system for .choochoo files.
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import sys ## so we can read command line arguments.
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from random import shuffle # allowing us to randomize selection of cars.
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import glob # allowing us to search the file system for .choochoo files.
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import sys # so we can read command line arguments.
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import curses
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from signal import signal, SIGINT
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import time ## allowing the loop steps of train animation to be slowed
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import string ## for input validation
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import time # allowing the loop steps of train animation to be slowed
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import string # for input validation
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from inspect import cleandoc
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from pathlib import Path
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traincarFN = ".choochoo"
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max_x = 35 ## max length of train car.
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max_y = 10 ## max height of train car.
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max_cars = 10 ## most cars to include in one train.
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print_train = False ## print train to file (instead of the screen scroll)
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max_x = 35 # max length of train car.
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max_y = 10 # max height of train car.
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max_cars = 10 # most cars to include in one train.
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print_train = False # print train to file (instead of the screen scroll)
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train = [""]*max_y ## empty train of correct height.
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train = [""]*max_y # empty train of correct height.
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cars: list[list[str]] = []
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engine = [
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@ -134,10 +134,10 @@ def test_user_car():
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choochoo_list = choochoo_string.split("\n")
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car = "\n".join(choochoo_list)
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car2 = car.replace("\t", "") ## do not allow tabs
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car2 = car2.replace("\v", "") ## do not allow vertical tabs
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car2 = car2.replace("\f", "") ## do not allow line feeds
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car2 = car2.replace("\r", "") ## do not allow carriage returns
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car2 = car.replace("\t", "") # do not allow tabs
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car2 = car2.replace("\v", "") # do not allow vertical tabs
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car2 = car2.replace("\f", "") # do not allow line feeds
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car2 = car2.replace("\r", "") # do not allow carriage returns
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car2 = ''.join([i if string.printable.find(i) >= 0 else ' ' for i in car2])
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print("")
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@ -194,42 +194,42 @@ def link_car(car: list[str]):
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return car
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def validate_car(car: list[str]):
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## this function (1) checks that a train car isn't too tall or too long
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## (2) pads it vertically or on the right side if it is too short or if
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## not all lines are the same length and (3) removes bad characters.
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# this function (1) checks that a train car isn't too tall or too long
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# (2) pads it vertically or on the right side if it is too short or if
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# not all lines are the same length and (3) removes bad characters.
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car_str = "\n".join(car)
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car_str = ''.join([i if ord(i) < 128 else ' ' for i in car_str])
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car_list = car_str.split("\n")
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## remove blank lines from top and bottom of car,
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## so we can estimate its true size.
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# remove blank lines from top and bottom of car,
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# so we can estimate its true size.
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while car_list[0].strip() == "":
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car_list.pop(0) ## clear top
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car_list.pop(0) # clear top
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while car_list[(len(car_list)-1)].strip() == "":
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car_list.pop() ## clear bottom
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car_list.pop() # clear bottom
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## len(choochoo_list) is the height of the train car, in number of rows.
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# len(choochoo_list) is the height of the train car, in number of rows.
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if len(car_list) > max_y+1 or len(car_list) == 0:
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return 0 ## train car too tall or non-existant; skip it.
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return 0 # train car too tall or non-existant; skip it.
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## vertically pad short cars with 1 space (lines will be lengthened later).
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# vertically pad short cars with 1 space (lines will be lengthened later).
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while len(car_list) < max_y:
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car_list = [" "] + car_list
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for idx,row in enumerate(car_list):
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car_list[idx] = row.rstrip()
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longest_line = len(max(car_list, key=len)) ## longest line in .choochoo file.
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longest_line = len(max(car_list, key=len)) # longest line in .choochoo file.
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for idx,row in enumerate(car_list):
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if len(row) > max_x+1: ## check length of each row in .choochoo file.
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return 0 ## train car too long; skip it.
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if len(row) > max_x+1: # check length of each row in .choochoo file.
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return 0 # train car too long; skip it.
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elif "\t" in row or "\v" in row or "\f" in row or "\r" in row:
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return 0 # skip if contains tabs, vert tabs, line feeds or carriage ret
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elif len(row) < longest_line:
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padding = " "*(longest_line - len(row))
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car_list[idx] += padding ## add padding spaces.
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car_list[idx] += padding # add padding spaces.
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return car_list
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@ -238,19 +238,19 @@ def print_all_cars():
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for fname in glob.glob('/home/*/' + traincarFN):
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try:
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with open(fname, 'r') as myfile:
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## print fname ## debug, print file path and name
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# print fname # debug, print file path and name
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choochoo_string = myfile.read()
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choochoo_list = choochoo_string.split("\n")
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if len(choochoo_list) > max_y+1:
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continue ## the train car was too tall; skip it.
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continue # the train car was too tall; skip it.
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car = validate_car(choochoo_list) ## printing is only a DEBUG feature.
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car = validate_car(choochoo_list) # printing is only a DEBUG feature.
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if car != 0:
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print("")
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print(fname + ":")
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print("\n".join(car)) ## print the car to stdout
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print("\n".join(car)) # print the car to stdout
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## HOW TO CLOSE THE FILE HANDLE? fname.close(), close(fname), ...?
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# HOW TO CLOSE THE FILE HANDLE? fname.close(), close(fname), ...?
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except:
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pass;
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# print "Cannot open " + fname # for debuggering purposes
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stdscr.refresh()
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time.sleep(.03)
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# ev = stdscr.getch() ## seems like curses waits for input, which won't work here.
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# ev = stdscr.getch() # seems like curses waits for input, which won't work here.
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# if ev in (ord('Q'), ord('q')):
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# return
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# elif ev == curses.KEY_UP: ## up
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# elif ev == curses.KEY_UP: # up
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# y_pos += 1
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# elif ev == curses.KEY_DOWN: ## down
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# elif ev == curses.KEY_DOWN: # down
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# y_pos -= 1
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sys.exit()
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## start a loop that collects all .choochoo files and processes on in each loop
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# start a loop that collects all .choochoo files and processes on in each loop
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for fname in glob.glob('/home/*/' + traincarFN):
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car_len = 1
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try:
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with open(fname, 'r') as myfile:
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## print fname ## debug, print file path and name
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# print fname # debug, print file path and name
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choochoo_string = myfile.read()
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choochoo_list = choochoo_string.split("\n")
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if len(choochoo_list) > max_y+1:
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continue ## the train car was too tall; skip it.
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continue # the train car was too tall; skip it.
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car = validate_car(choochoo_list) ## printing is only a DEBUG feature.
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car = validate_car(choochoo_list) # printing is only a DEBUG feature.
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if car != 0:
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cars.append(car) ## start a list of lists (list of cars) here.
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cars.append(car) # start a list of lists (list of cars) here.
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## HOW TO CLOSE THE FILE HANDLE? fname.close(), close(fname), ...?
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# HOW TO CLOSE THE FILE HANDLE? fname.close(), close(fname), ...?
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except:
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pass;
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##print "Cannot open " + fname # for debuggering purposes
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#print "Cannot open " + fname # for debuggering purposes
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while len(cars) < max_cars:
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cars.append([*default_car]) ## add copies of default cars if train too short
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cars.append([*default_car]) # add copies of default cars if train too short
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shuffle(cars)
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cars = cars[0:max_cars]
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