Python IOError: [Errno 13] Permission denied in ubuntu?

Question

I want to write string character to file, but i get error like this IOError: [Errno 13] Permission denied: '/python/add.txt'. how to solve this?

this is my code

q = open('/python/add.txt','r')
a = ['123', '234', '456']
lst = []
for line in q:
    for word in a:
        if word in line:
            line = line.replace(word + "\n",'')
    lst.append(line)
q.close()
z = open(r'/python/add.txt','w+')
for line in lst:
    z.write(line)
z.close()

Answer 1

You have 3 choices:

• Run your script as root user. I.e.:

  sudo ./path/to/your/script.py or sudo python3 path/to/your/script.py

• Grant read, write & execute permissions to /python and read & write permissions to /python/add.txt for your user/group. There are a few ways to reach that ends, e.g.:

  sudo chown -R my_user:my_user /python && sudo chmod u+rw /python/add.txt

• Put add.txt somewhere else (as per @steeldriver's comment) such as within your users $HOME.