从字符串列表中删除空字符串值

Question

I am reading string information as input from a text file and placing them into lists, and one of the lines is like this:

30121,long,Mehtab,10,20,,30

I want to remove the empty value in between the ,, portion from this list, but have had zero results. I've tried .remove() and filter() . Python reads it as a 'str' value.

Answer 1

>>> import re
>>> re.sub(',,+', ',', '30121,long,Mehtab,10,20,,30')
'30121,long,Mehtab,10,20,30'

Answer 2

Use split() and remove()

In [11]: s = '30121,long,Mehtab,10,20,,30'

In [14]: l = s.split(',')

In [15]: l.remove('')

In [16]: l
Out[16]: ['30121', 'long', 'Mehtab', '10', '20', '30']

Answer 3

You can split the string based on your separator ("," for this) and then use list comprehension to consolidate the elements after making sure they are not blank.

",".join([element for element in string.split(",") if element])

We can also use element.strip() as if condition if we want to filter out string with only spaces.

Answer 4

Filter should work. First I am writing the data in a list and then using filter operation to filter out items in a list which which are empty. In other words, only taking items that are not empty.

data = list("30121","long","Mehtab",10,20,"",30)
filtered_data = list(filter(lambda str: str != '', data))
print(filtered_data)