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+--- Thread: Prompting for an existing path and file name, if invalid, reprompt. (/showthread.php?tid=254)
Prompting for an existing path and file name, if invalid, reprompt. - Mark - 13-07-2010
Prompting for an existing path and file name
Here's a tutorial on checking if a path and file exists, if it doesn't then it'll re-prompt.
Firstly, we need to import the os module.
[code=python]import os[/code]
Next, we'll define our question.
[code=python]def start():
file_path = raw_input ("Enter the file path: ")[/code]
file_path will be equal to the users input, we're going to use os.path.exists to make sure that the path exists.
[code=python]
if os.path.exists(file_path):
print "This file exists"[/code]
Finally we're going to use "if not". If the file doesn't exist, you'll be re-prompted.
[code=python]
if not os.path.exists(file_path):
print "This file doesn't exist"
[/code]
The finished code
[code=python]import os
def start():
file_path = raw_input ("Enter the file path: ")
if os.path.exists(file_path):
print "This file exists"
if not os.path.exists(file_path):
print "This file doesn't exist"
start()
start()[/code]