消除文件读取Python中的空行

我正在尝试使用Python将文件读入列表。但当我这样做时，列表会在每个条目后显示为空行。源文件没有那个

我的代码：

aws_env_list="../../../source_files/aws_environments/aws_environments_all.txt"
    with open(aws_env_list, 'r') as aws_envs:
        for line in aws_envs:
        print(line)

每行在每个条目后打印一个空行：

company-lab

company-bill

company-stage

company-dlab

company-nonprod

company-prod

company-eng-cis

源文件如下所示：

company-lab
company-bill
company-stage
company-dlab
company-nonprod
company-prod
company-eng-cis

aws_env_list="../../../source_files/aws_environments/aws_environments_all.txt"
with open(aws_env_list, 'r') as aws_envs:
    for line in aws_envs.readlines(): 
        line = line.strip() # You can strip it here and reassign it to the same variable
        # Now all your previous code with the variable 'line' will work as expected
        print(line) # no need to strip again
        do_computations(line) # you can pass it to functions without worry

---

<>如何在每次条目后使用“

”逐行遍历一个文件？

for line in aws_envs:

line的值包括行尾字符…默认情况下，print命令会将行尾字符添加到输出中。可以通过将“结束”参数设置为空值来抑制该操作。比较：

>>> print('one');print('two')
one
two

Vs:

---

文件的每行末尾都有一个新行字符，如：

company-lab\n
company-bill\n
company-stage\n
company-dlab\n
company-nonprod\n
company-prod\n
company-eng-cis # not here though this has an EOF (end-of-file) character.

因此，您对printline的调用将这些包含在打印中！您可以通过以下方式避免这种情况：

aws_env_list="../../../source_files/aws_environments/aws_environments_all.txt"
with open(aws_env_list, 'r') as aws_envs:
    for line in aws_envs.readlines():
        print(line.strip()) # just strip the \n away!

更新

如果您只想使用文本而不使用换行符进行计算，可以按如下方式将其删除：

company-lab
company-bill
company-stage
company-dlab
company-nonprod
company-prod
company-eng-cis

aws_env_list="../../../source_files/aws_environments/aws_environments_all.txt"
with open(aws_env_list, 'r') as aws_envs:
    for line in aws_envs.readlines(): 
        line = line.strip() # You can strip it here and reassign it to the same variable
        # Now all your previous code with the variable 'line' will work as expected
        print(line) # no need to strip again
        do_computations(line) # you can pass it to functions without worry

该文件包含换行符“\n”，但在循环时不会删除它们。print函数还可以在末尾打印换行符。因此，您可以使用printline，end=从打印函数中删除新行，或者使用line=line.strip从行中删除新行。