File size: 328 Bytes
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def check_integer(text):
text = text.strip()
if len(text) < 1:
return None
else:
if all(text[i] in "0123456789" for i in range(len(text))):
return True
elif (text[0] in "+-") and \
all(text[i] in "0123456789" for i in range(1,len(text))):
return True
else:
return False |