在Python中打印列表元素和字符串有不同的结果 [英] Printing list elements and strings in Python have different results

问题描述

我有一个 .csv 文件，编码在 UTF-8 。
我使用Python 2.7 。
某些整合发生在 Ubuntu 。
当我打印出这样的文件的结果：

I have a .csv file which is encoded in UTF-8. I am working with Python 2.7. Something intereseting happens on Ubuntu. When I print out the results of the file like this:

with open("file.csv", "r") as file:
    myFile = csv.reader(file, delimiter = ",")
    for row in myFile:
        print row

我得到 \xc3\x ， \ xa1 \ ，....请注意， row 是一个列表，列表中的所有元素都被标记为字符串''。
当我打印出这样的结果：

I get signs like \xc3\x, \xa1\, .... Note that row is a list and all the elements in my list are marked as strings by '' in the output. When I print out the results like this:

with open("file.csv", "r") as file:
    myFile = csv.reader(file, delimiter = ",")
    for row in myFile:
        print ",".join(row)

一切都解码得很好。请注意，我原始文件中的每一行都是一个大字符串。

Everything is decoded fine. Note that every row from my original file is one big string here.

为什么？

推荐答案

这是因为在打印列表的情况下，Python使用 repr（），但是当打印字符串时，它使用 str（）。示例：

This is because in the case of printing a list, Python is using repr(), but when printing a string it is using str(). Example:

unicode_str = 'åäö'
unicode_str_list = [unicode_str, unicode_str]
print 'unwrapped:', unicode_str
print 'in list:', unicode_str_list
print 'repr:', repr(unicode_str)
print 'str:', str(unicode_str)

产生：

unwrapped: åäö
in list: ['\xc3\xa5\xc3\xa4\xc3\xb6', '\xc3\xa5\xc3\xa4\xc3\xb6']
repr: '\xc3\xa5\xc3\xa4\xc3\xb6'
str: åäö

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