How to read a text file and count how many lists it contains?-CodePudding

I'm writing a program which is converting, sorting and generally doing automate tasks.

My problem is now: I don't know how to count how many lists a text file contains.

The Format in the text file is like this:

["apple", "banana", "cherry"]

I tried already some options with len() but only get the number of letters.

CodePudding user response：

if each line contains a different list then you can count lines, by using simply

file = open("filename.txt", "r")
len(file.readlines())

otherwise if you want to read and store each list into a different list then you can do something like this

file  = open("input.txt", "r")
lists = []
for line in file.readlines():
  lst = line.replace("[", "").replace("]","").replace("\"","").replace("\n","").split(", ")
  lists.append(lst)
print(len(lists))