There is a long way to go, and there is a long way to go to learn python. For beginners, the most uncomfortable thing is reporting errors, followed by errors. The translation is done, but it will not be changed. So today, I am an IKUN teacher , Combined with our common mistakes, make a complete list of common mistakes! ! , If you encounter errors in the future, you can search directly in this article!
1、【SyntaxError: xxxxxxxxxxx】
This error is a [syntax] error
wrong reason:
1. The brackets are not written
2. The colon is not written
3. There is no space after the keyword:
Note that there are some errors that are themselves syntax errors and cannot be caught.
2、【NameError: name 'name' is not defined】
This error is [variable name] error
wrong reason:
1. The variable name has not been created
2. The upper and lower variable names are inconsistent (wrongly written by hand)
3、【IndexError: list index out of range】
This error is an [index] error
wrong reason:
1. The index value written exceeds the index of [string, tuple, list, etc.]
2. Additional knowledge 如果是切片超出范围，就不会报错:
returns an empty list
4、【KeyError: xxxxx】
This error is [key] error
wrong reason:
1. The value corresponding to the written key cannot be queried in the dictionary!
2. Additional knowledge 如果用get，就不会报错:
If the query cannot be found, it will return None by default. If the query cannot find the return value, it can be customized
custom return value
5、【FileNotFoundError: [Errno 2] No such file or directory: 'xxxxx'】
This error is [file not found] error
wrong reason:
1. The path of the file you want to read is wrong
2. The file you want to read does not exist at all
6、【ZeroDivisionError: division by zero】
This error is [divisor is 0] error
wrong reason:
1. Your numerator is 0, please check your numerator
7、【UnboundLocalError: local variable 'xx' referenced before assignment】
This error is [global variable is declared to be modified inside the function] error
wrong reason:
1. There is a variable outside the function, the global variable is not declared, and the modification is made inside the function, so an error is reported
2. Modify (add global)
8、【AttributeError: 'xxx1' object has no attribute 'xxx2'】
This error is [xxx1 object has no attribute called xxx2] error
wrong reason:
1. The function/property called by the object is wrongly written
2. The function/property called by the object does not exist at all
9、【UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd0 in position 0: invalid continuation byte】
This error is [file decoding] error
wrong reason:
1. If it is UnicodeDecodeError: 'utf-8' codec can't...
Just change encoding='UTF-8' to encoding='gbk
Conversely: just change encoding='gbk' to encoding='utf-8'
After modification:
Hope it helps beginners
A little programmer dedicated to office automation
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