I'm very new to programming and python. I'm writing a script and I want to exit the script if the customer type a white space. questions is how do I do it right? This is my attempt but I think is wrong
For example
userType = raw_input('Please enter the phrase to look: ')
userType = userType.strip()
line = inf.readline()
while (userType == raw_input)
print "userType\n"
if (userType == "")
print "invalid entry, the program will terminate"
# some code to close the app
I know this is old, but this may help someone in the future. I figured out how to do this with regex. Here is my code:
import re
command = raw_input("Enter command :")
if re.search(r'[\s]', command):
print "No spaces please."
else:
print "Do your thing!"
The program you provided is not a valid python program. Because you are a beginner some small changes to you program. This should run and does what I understood what it should be.
This is only a starting point: the structure is not clear and you have to change things as you need them.
userType = raw_input('Please enter the phrase to look: ')
userType = userType.strip()
#line = inf.readline() <-- never used??
while True:
userType = raw_input()
print("userType [%s]" % userType)
if userType.isspace():
print "invalid entry, the program will terminate"
# some code to close the app
break
After applying strip to remove whitespace, use this instead:
if not len(userType):
# do something with userType
else:
# nothing was entered
You could strip all whitespaces in your input and check if anything is left.
import string
userType = raw_input('Please enter the phrase to look: ')
if not userType.translate(string.maketrans('',''),string.whitespace).strip():
# proceed with your program
# Your userType is unchanged.
else:
# just whitespace, you could exit.
