如何将字典存储在文件中（Python）

Question

I am new to python and I wanted to know if there is any way that I can store a dictionary in a file without using any module? Example of Dictionary -

credentials = {
  "username" : "ABC",
  "email"    : "abc@email.com",
  "password" : "abc123@#"
}

Answer 1

Sure you can, the simplest way is just calling str() on it:

with open("out.txt", "w") as file:
    file.write(str(<dict>))

Though it's probably not the smartest way to do it since you'll need to retrieve it back and then the problem might occur.

Instead perhaps use json.dumps() (or json.dump() if you prefer using file descriptor), or serialize it to XML (manually since there's no simple "dumps()" as for json) or pickle.dumps() .

To retrieve the value back then use:

• ast.literal_eval() for str() (may break)
• json.loads() / json.load() for JSON
• xml.etree.ElementTree.parse for XML
• picke.loads() /picke.load() for binary pickle format

Answer 2

import os

credentials = {
  "username" : "ABC",
  "email"    : "abc@email.com",
  "password" : "abc123@#"
}

for c in credentials:
    file_data = credentials.items()
file_name = os.path.join(os.path.dirname(__file__), 'test.txt')

with open(f'{file_name}.txt', 'w') as write_file:
    write_file.write(str(file_data))

Answer 3

you need to use json format

import json
credentials = {
  "username" : "ABC",
  "email"    : "abc@email.com",
  "password" : "abc123@#"
}

with open("creds.json", "w") as outfile: 
    json.dump(credentials, outfile)

without Any module

credentials = {
  "username" : "ABC",
  "email"    : "abc@email.com",
  "password" : "abc123@#"
}

with open("creds.txt", "w") as outfile:
    outfile.write(str(credentials))