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64 lines
1.6 KiB
Python
Executable File
64 lines
1.6 KiB
Python
Executable File
# Python 2.7
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# prompt user for file of specific type(s).
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# 11/01/13 sebastian raschka
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import os.path
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def get_filename(file_type):
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'''repeatedly prompts user for a file of specific type.
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arguments:
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file_type: list with accepted file types as strings.
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returns:
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(string): absolute path to the specified input file.
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'''
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while True:
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print "\n\nplease enter a file name, \nor type --help to get"\
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" a list of the accepted file formats"
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file_name = raw_input(": ")
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if file_name == "--help":
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print "\naccepted file format(s): ",
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for f in file_type:
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print f,
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continue
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if not os.path.isfile(file_name):
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print "\n\nsorry, this file doesn't exist. please try again.\n"
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continue
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if not (file_name.split(".")[-1] in file_type):
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print "\nplease provide a file in correct format."
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continue
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break
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return os.path.abspath(file_name)
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#get_filename(["txt", "doc"])
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# ===========================
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# EXAMPLE
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# ===========================
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'''
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[bash]~/Desktop >python get_filename.py
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please enter a file name,
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or type --help to get a list of the accepted file formats
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: --help
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accepted file format(s): txt doc
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please enter a file name,
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or type --help to get a list of the accepted file formats
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: test.tx
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sorry, this file doesn't exist. please try again.
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please enter a file name,
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or type --help to get a list of the accepted file formats
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: test.txt
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[bash]~/Desktop >
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'''
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