Question

So say i had some text like this:

line num 1
line num 2

line num 3



line num 4

I am trying to get rid of all the new lines in between line 2 and 3 and line 3 and 4 while having all of the line num on separate new lines. How would i accomplish this? I have already tried puth=ing them into a list then looping throught them and taking out all of the lone

页: 1

obj=[ line num 1 , line num 2 , 
 , line num 3 , 
 , 
 , line num4 ]
a=-1
for i in obj:
    a+=1
    if i== 
 :
        print  yes 
        del obj[a]


print obj

产出:

[ line num 1 ,  line num 2 ,  line num 3 ,  
 ,  line num4 ]

它收集了一些但并非全部。

Answer 1

In short: don t erase elements while iterating over a list.

Here you will find lot of ways to do this: Remove items from a list while iterating

注

filter(lambda x: x!= 
 , obj)

Answer 2

我只字不提整个档案内容:

>>> s = """line num 1
line num 2

line num 3



line num 4"""
>>> import re
>>> print re.sub( 
+ ,  
 , s)
line num 1
line num 2
line num 3
line num 4

P.S. You should newer change list while iterating it.

Answer 3

可在以下网址查阅:

>>> obj = [ line num 1 ,  line num 2 ,  
 ,  line num 3 ,  
 ,  
 ,  line num4 ]

>>> [item for item in obj if not item.isspace()]

[ line num 1 ,  line num 2 ,  line num 3 ,  line num4 ]
>>>

Answer 4

def remove_new_line(obj):
    if "
" in obj:
        obj.remove("
")
    remove_new_line(obj)
    return obj

obj = [ line num 1 ,  line num 2 ,  
 ,  line num 3 ,  
 ,  
 ,  line num4 ]

print remove_new_line(obj)

Answer 5

也可以尝试:

f = open("your file.txt", r )
values = f.read()
val = re.split(r"
+",values)
print val

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