FILE HANDLING

File Handling & Config Parsing

System Architecture Visualization

config.json

Disk

open()

with open(...)

json.load()

Parse String

Dictionary

Memory

DOWNLOADING CONCEPT: READING & WRITING FILES...

↳The open() function returns a file object.
↳ALWAYS use the with context manager, which ensures the file is safely closed even if an exception occurs.

python

with open('/var/log/syslog', 'r') as f:
    for line in f:
        print(line.strip())

▲ LIVE INCIDENTA script reading a massive 10GB log file crashes the server.

sre@arena:~/python-file-io

sre@arena:~$ python3 parse_logs.py