[Solved] Why does this code raise an error?from RPLCD.i2c import CharLCD lcd = CharLCD('PCF8574', 0x27) lcd.write_string(1234) | Raspberry Pi

Raspberry Pi - Display and Output

Why does this code raise an error?

from RPLCD.i2c import CharLCD
lcd = CharLCD('PCF8574', 0x27)
lcd.write_string(1234)

APCF8574 is not a valid i2c_expander

BIncorrect I2C address format

CMissing lcd.clear() before writing

Dwrite_string expects a string, not an integer

Step-by-Step Solution

Solution:

Step 1: Check the argument type for write_string
write_string requires a string argument, but 1234 is an integer.
Step 2: Understand type error cause
Passing an integer causes a TypeError because it cannot be converted automatically.
Final Answer:
write_string expects a string, not an integer -> Option D
Quick Check:
write_string argument must be string [OK]

Quick Trick: Always convert numbers to strings before write_string [OK]

Common Mistakes:

MISTAKES

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Why does this code raise an error?