Solve the problem of mixed errors in Chinese and English in Python

I wrote A small script in Python two days ago. One of the requirements is to read data from A text file A, and then process it and write it into A new text file B. However, file A contains both English and Chinese characters.
Writing the code to handle this requirement is not complicated. You can easily write similar code:

1def write_a_line(line, fp): 2    fp.write(line)

However, once this program encounters a string with Chinese characters, it may encounter the following problems:

Traceback (most recent call last): File "<stdin>", line 1, in <module> UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in range(128)

Well, this is a big case for programmers who usually use C # or Java. According to the error message, when writing a file, Python encodes the line variable and encodes the line Object in ASCII code.

We all know that Python supports unicode and the unicode type is "unicode ". To make a string a unicode string, you can add a lowercase letter "u" before the string's quotation marks ". After reading the Python documentation, we can send the write method to receive the str object. But Python is not like C #. It does not need to declare the type of the variable. So we should first look at what line is. To solve this problem, I added a line of the above Code:

1def write_a_line(line, fp): 2    print line.__class__.__name__ 3    fp.write(line)

After the code is run, I found that when the line contains Chinese characters, the type of our line variable is unicode. I searched for a post related to unicode and file writing on the Internet to get a message. After encoding the unicode object by calling the encode method, I can write the file normally. The code is programmed as follows:

1def write_a_line(line, fp): 2    if line.__class__.__name__ == “unicode”: 3        line = line.encode(“GB2312”) 4    fp.write(line)

Here, we should note that we cannot beat a single stick, line may be a unicode object or str object, but we only encode the unicode object. The problem is finally solved.

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