如何在Python中读取文件的每一行,并将每一行存储为列表中的元素?

我想逐行读取文件,并将每一行附加到列表的末尾。


当前回答

f = open("your_file.txt",'r')
out = f.readlines() # will append in the list out

现在,变量out是您想要的列表(数组)。您可以选择:

for line in out:
    print (line)

Or:

for line in f:
    print (line)

你会得到同样的结果。

其他回答

如果文档中也有空行,我希望读取内容并将其通过过滤器以防止空字符串元素

with open(myFile, "r") as f:
    excludeFileContent = list(filter(None, f.read().splitlines()))

将文件行读取到列表中的干净和Python方式


首先也是最重要的一点,你应该专注于以一种高效的方式打开文件并阅读其内容。下面是一个我个人不喜欢的方式的例子:

infile = open('my_file.txt', 'r')  # Open the file for reading.

data = infile.read()  # Read the contents of the file.

infile.close()  # Close the file since we're done using it.

相反,我更喜欢以下打开文件的方法,既可以读也可以写非常干净,不需要关闭文件的额外步骤一旦您使用完它。在下面的语句中,我们将打开文件用于读取,并将其分配给变量infile一旦代码在此语句已完成运行,文件将自动关闭。

# Open the file for reading.
with open('my_file.txt', 'r') as infile:

    data = infile.read()  # Read the contents of the file into memory.

现在我们需要专注于将这些数据引入Python列表,因为它们是可迭代的、高效的和灵活的。在您的案例中,期望的目标是将文本文件的每一行放入一个单独的元素中。为此,我们将使用splitlines()方法,如下所示:

# Return a list of the lines, breaking at line boundaries.
my_list = data.splitlines()

最终产品:

# Open the file for reading.
with open('my_file.txt', 'r') as infile:

    data = infile.read()  # Read the contents of the file into memory.

# Return a list of the lines, breaking at line boundaries.
my_list = data.splitlines()

测试我们的代码:

文本文件的内容:

     A fost odatã ca-n povesti,
     A fost ca niciodatã,
     Din rude mãri împãrãtesti,
     O prea frumoasã fatã.

打印测试报表:

    print my_list  # Print the list.

    # Print each line in the list.
    for line in my_list:
        print line

    # Print the fourth element in this list.
    print my_list[3]

输出(因unicode字符而不同):

     ['A fost odat\xc3\xa3 ca-n povesti,', 'A fost ca niciodat\xc3\xa3,',
     'Din rude m\xc3\xa3ri \xc3\xaemp\xc3\xa3r\xc3\xa3testi,', 'O prea
     frumoas\xc3\xa3 fat\xc3\xa3.']

     A fost odatã ca-n povesti, A fost ca niciodatã, Din rude mãri
     împãrãtesti, O prea frumoasã fatã.

     O prea frumoasã fatã.

这比必要的更明确,但可以做到你想要的。

with open("file.txt") as file_in:
    lines = []
    for line in file_in:
        lines.append(line)

如果要包含以下内容:

with open(fname) as f:
    content = f.readlines()

如果不希望包含:

with open(fname) as f:
    content = f.read().splitlines()

具有文本文件内容:

line 1
line 2
line 3

我们可以在上面txt的同一目录中使用此Python脚本

>>> with open("myfile.txt", encoding="utf-8") as file:
...     x = [l.rstrip("\n") for l in file]
>>> x
['line 1','line 2','line 3']

使用追加:

x = []
with open("myfile.txt") as file:
    for l in file:
        x.append(l.strip())

Or:

>>> x = open("myfile.txt").read().splitlines()
>>> x
['line 1', 'line 2', 'line 3']

Or:

>>> x = open("myfile.txt").readlines()
>>> x
['linea 1\n', 'line 2\n', 'line 3\n']

Or:

def print_output(lines_in_textfile):
    print("lines_in_textfile =", lines_in_textfile)

y = [x.rstrip() for x in open("001.txt")]
print_output(y)

with open('001.txt', 'r', encoding='utf-8') as file:
    file = file.read().splitlines()
    print_output(file)

with open('001.txt', 'r', encoding='utf-8') as file:
    file = [x.rstrip("\n") for x in file]
    print_output(file)

输出:

lines_in_textfile = ['line 1', 'line 2', 'line 3']
lines_in_textfile = ['line 1', 'line 2', 'line 3']
lines_in_textfile = ['line 1', 'line 2', 'line 3']