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1. Read File2. Write File3. Append to File4. Read CSV File5. Write CSV File6. JSON Read7. JSON Write8. File Copy9. File Rename10. Read Binary File11. Write Binary File12. Count Words in File13. Count Lines in File14. Count Characters in File15. Search Substring in File16. Iterate File Lines17. File Metadata18. File Compression19. File Decompression20. Delete File

JSON Write in Python

Write a Python dictionary as JSON into a file.

BeginnerFile Handling ProgramsExample 7 of 20
json-write.py
1# Program to write JSON to a file
2

3import json
4

5data = {
6    "name": "Alice",
7    "age": 25,
8    "skills": ["Python", "SQL"]
9}
10

11filename = input("Enter JSON filename to write: ")
12

13with open(filename, "w", encoding="utf-8") as f:
14    json.dump(data, f, indent=2)
15

16print("JSON data written to", filename)

Output

Enter JSON filename to write: config.json
JSON data written to config.json

What's going on

json.dump serializes Python objects to JSON text and writes them to a file with pretty indentation.

After this program

If the idea is still fuzzy, read Day 14: File Handling in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 20 file handling programs, or see every topic on Python exercises.

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