如何在具有可重复段落的指定字符串之后读取/修改具有特定位置的行？同时打印所有行

问题描述

我需要在特定字符串（可能是段落标题）之后修改几行，例如根据行索引位置向行添加制表符空格等前缀。

text = """Para 1
example line one
example blah blah line 
example line one
example blah blah line 
Some other lines 1
some other lines 2
Para 2
another para line start
another para line start goes
another para line three
another para line four
Para 3
line 1
line 2
line 3
line 4"""
for x in text:
    if x == 'Para':
        print('Starting specified loop')
        for x in text:
            if x % 2 == 0: #line 2,4 after string to modify
                print('In specified loop   ',x)
            else:
                print("Out Specified loop",x)    
    else:
        print('all other lines',x)

此代码在堆栈中找到并且适用于 xrange 数字，但对于文本它会给出错误。此外，我尝试使用枚举器，但无论行位置如何，它都会打印所有行。我期望在字符串 Para 后修改第 2 行和第 4 行的输出：

Para 1
example line one
     example blah blah line 
example line one
     example blah blah line 
Some other lines 1
some other lines 2
Para 2
another para line start
    another para line start goes
another para line three
    another para line four
Para 3
line 1
    line 2
line 3
    line 4

希望我已经简要解释了。感谢您的时间和耐心等待回复。

解决方法

text = """
Para 1
line 1
line 2
line 3
line 4
Some other lines 1
some other lines 2
Para 2
line 1
line 2
line 3
line 4
Para 3
line 1
line 2
line 3
line 4
"""

res = text.split("\n")
# print(res)

for each_word in res:
    if "line 2" in each_word or "line 4" in each_word:
        print "    ",each_word
    else:
        print each_word