This is a slightly weird request but I am looking for a way to write a list to file and then read it back some other time.
I have no way to remake the lists so that they are correctly formed/formatted as the example below shows.
My lists have data like the following:
test
data
here
this
is one
group :)
test
data
here
this
is another
group :)
This question is related to
python
file
list
python-2.7
save
As long as your file has consistent formatting (i.e. line-breaks), this is easy with just basic file IO and string operations:
with open('my_file.txt', 'rU') as in_file:
data = in_file.read().split('\n')
That will store your data file as a list of items, one per line. To then put it into a file, you would do the opposite:
with open('new_file.txt', 'w') as out_file:
out_file.write('\n'.join(data)) # This will create a string with all of the items in data separated by new-line characters
Hopefully that fits what you're looking for.
Let's define a list first:
lst=[1,2,3]
You can directly write your list to a file:
f=open("filename.txt","w")
f.write(str(lst))
f.close()
To read your list from text file first you read the file and store in a variable:
f=open("filename.txt","r")
lst=f.read()
f.close()
The type of variable lst
is of course string. You can convert this string into array using eval
function.
lst=eval(lst)
Source: Stackoverflow.com