don't crash if tzk is used without arguments
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@ -385,6 +385,7 @@ def launch():
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# go there before doing anything else.
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# go there before doing anything else.
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if (not os.path.exists("tzk_config.py")
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if (not os.path.exists("tzk_config.py")
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and os.environ.get('TZK_DIRECTORY')
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and os.environ.get('TZK_DIRECTORY')
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and len(sys.argv) > 1
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and sys.argv[1] != "init"): # we can't init an existing TZK_DIRECTORY
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and sys.argv[1] != "init"): # we can't init an existing TZK_DIRECTORY
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try:
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try:
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os.chdir(os.environ['TZK_DIRECTORY'])
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os.chdir(os.environ['TZK_DIRECTORY'])
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