wyz23x2 <[email protected]> added the comment:
Q: Why not use f"{var:,}".replace(',', sepchar) for the sepchar parameter?
A: It is very complicated in the case below:
num = 1234567
text = 'Hello, world!'
print(f"{num:,}{text}").replace(',', ' ') # Becomes '1 234 567Hello world!'
print(f"{f'{num:,}'.replace(',', ' ')}{text}") # Too complicated!
print(f"{num:,}".replace(',', ' ')+text) # Slow!
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<https://bugs.python.org/issue41250>
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