The program should convert a letter into schema A-> a or a-> A and work normally except that at the end of the string a None appears. Anyone know how I can strip it?
def swap_case(s):
for x in s:
if x.isupper()==True:
print(x.lower(), end="")
else:
print(x.upper(), end="")
s = input('Digite: ')
result = swap_case(s)
print(result)
A None appears because you are not returning anything in your function, you are just printing, change to:
def swap_case(s):
for x in s:
if x.isupper()==True:
return x.lower()
else:
return x.upper()
s = input('Digite: ')
result = swap_case(s)
print(result, end="")
Enjoying to improve:
2- (MOST IMPORTANT) The function does not seem to make much sense so (it will return only the first letter changed), because what you should want with " swap_case " is to change all the letters string provided, so it does not make sense, what you should want is:
def swap_case(s):
text = ''
for x in s:
if x.isupper():
text += x.lower()
else:
text += x.upper()
return text
s = input('Digite: ')
result = swap_case(s)
print(result)
Input: nElSoN
Output: NeLsOn
Reducing to a line within the function:
def swap_case(s):
return ''.join(x.lower() if x.isupper() else x.upper() for x in s)