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how remove sub path from csv file [closed]

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in 'id_path' in CSV file i want remove subpath from it such as
dataframe of csv file
i want remove all path before the image file name
./input/skin-cancer-malignant-vs-benign/data/test/benign/454.jpg
./input/skin-cancer-malignant-vs-benign/data/test/benign/90.jpg
./input/skin-cancer-malignant-vs-benign/data/test/benign/147.jpg
./input/skin-cancer-malignant-vs-benign/data/test/malignant/771.jpg
./input/skin-cancer-malignant-vs-benign/data/test/malignant/208.jpg
./input/skin-cancer-malignant-vs-benign/data/test/malignant/1383.jpg
./input/skin-cancer-malignant-vs-benign/data/test/malignant/1354.jpg
the output should be
454.jpg
90.jpg
147.jpg
771.jpg
208.jpg
1383.jpg
1354.jpg

rsplit() splits the data from the right side of the string and 1 is way of saying python to stop after first split.
txt = "./input/skin-cancer-malignant-vs-benign/data/test/benign/454.jpg"
x = txt.rsplit("/",1)
#your answer
print(x[1])
on your dataframe you could do something like:
train_df['id_path'] = train_df['id_path'].apply(lambda x: x.rsplit('/',1)[1])

Using str.replace:
df["filename"] = df["path"].str.replace(r'^.*/', '')
We could also use str.extract here:
df["filename"] = df["path"].str.extract(r'([^/]+\.\S+$)')

How to write a list containing tuples to a file in Python 3.7? [closed]

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I'm busy constructing a Physics simulator as a school project and need to store a list of shapes in a file to be read in when the program is loaded again. How do I store the list and return it to its original state, especially considering some of the list items are tuples or lists themselves.
This doesn't work:
with open(filename, 'w') as f:
f.write("\n".join(objs))
I expected to be able to write to a file but errors keep springing up as I can't write tuples.

Why not write objs to file as a string?
objs = (1, 2, 3, 4, 5)
with open('filename', 'w') as f:
f.write(str(objs))

How to save the following python output result to .csv format [closed]

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How can I save the result from this code to .csv format?
import re
import CSV
text = open('example.txt').read()
pattern = r'([0-9]+)[:]([0-9]+)[:](.*)'
regex = re.compile(pattern)
for match in regex.finditer(text):
result = ("{},{}".format(match.group(2),match.group(3)))

If I understood your question correctly, you can generate the CSV as follows:
import re
text = open('example.txt').read()
pattern = r'([0-9]+)[:]([0-9]+)[:](.*)'
regex = re.compile(pattern)
with open('csv_file.csv', 'w') as csv_file:
# Add header row with two columns
csv_file.write('{},{}\n'.format('Id', 'Tile'))
for match in regex.finditer(text):
result = ("{},{}".format(match.group(2),match.group(3)))
csv_file.write('{}\n'.format(result))

Parsing JSON fails as strings appear instead of dicts/lists [closed]

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with open('twit/example.json', encoding='utf8') as json_data:
for line in json_data:
try:
dataText = json.loads(line)
except ValueError:
continue
for a in dataText:
print(a["user"]["location"])
the result is: string indices must be integers
Update: The below answer is for printing
print(dataText["user"]["location"])
now I want this one:
print(a["user"]["location"])

If your json file is in a normal format, use this instead:
with open('twit/example.json', encoding='utf8') as json_data:
dataText = json.loads(line)
for a in dataText:
print(dataText["user"]["location"])
The way your code is currently written makes me think you have multiple json structures in a single file, separated by new lines. This is not how json is usually formatted.

How to use regular expression parse text with symbol "| " [closed]

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I need to parse a bunch of unformatted text similar to the one below.
those|DT|O considered|VBN|O anarchists|NNS|O at|IN|O best|JJS|O share|NN|O a|DT|O certain|JJ|O family|NN|O resemblance|NN|O .|.|O "|RQU|O
I need to use regular expression to parse the data into a format which would be like this:
The DT I-MISC
certain JJ O
in IN O
the DT B
pound NN I

with open('outfile.txt', 'wb') as outfile, open('infile.txt', 'r') as infile:
[outfile.write(i.replace('|', ' ') + '\n') for i in infile.read().split()]
You basically just want to split by whitespace then replace the | with whitespace correct? That seems to be what you're looking for.
EDIT:
Code now writes to file.
EDIT 2:
Code now reads from a file