Mini Project: Log Writer

Build a log writer that appends timestamped entries to a file

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What you will build

A write_log() function that appends a timestamped entry to a log file every time you call it.

Example output

After three calls, app.log contains:

[2024-01-15 10:30] Application started
[2024-01-15 10:30] User logged in
[2024-01-15 10:30] Request processed

Design

Function	Purpose
`write_log(filename, message)`	Append `[timestamp] message` to the file

Note on timestamps

In production code, you would use datetime.now() from the datetime module to get the current time. This demo uses a hardcoded timestamp so the output is always the same.

Instructions

Build the log writer function.

Define a function named write_log that takes filename and message. Inside, create a variable named timestamp and assign it "2024-01-15 10:30".
Still inside the function, open filename in append mode using with open(filename, "a") as file:. Inside the block, call file.write(f"[{timestamp}] {message}\n").
Call write_log("app.log", "Application started").
Call write_log("app.log", "User logged in").
Call write_log("app.log", "Request processed").
Call print("app.log updated with 3 entries.").

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# Step 1: Define write_log(filename, message) with a hardcoded timestamp

#   Step 2: Open filename in append mode and write [timestamp] message

# Step 3: Log "Application started"
# Step 4: Log "User logged in"
# Step 5: Log "Request processed"
# Step 6: Print confirmation