| 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 |