python for loop converting from C for loop

Question

the following is a part of C code for singly linked list:

for(tptr = start; tptr != NULL && tptr->data < newnode->data; prev=tptr, tptr= tptr->next);

How do I convert this for loop in C to for loop in Python?

Don't put all your logic in the for statement. It makes the code hard to understand. — stark
– stark, Commented Aug 11, 2021 at 18:59
If you provide a complete, reproducible example, we can help you convert it to python. As it is we have to make some assumptions about the data structures that you've used. — h0r53
– h0r53, Commented Aug 11, 2021 at 19:02

Philipp Claßen · Accepted Answer · 2021-08-11 20:39:46Z

2

In C

for(tptr = start; tptr != NULL && tptr->data < newnode->data; prev=tptr, tptr= tptr->next);

is equivalent to

tptr = start;
while (tptr != NULL && tptr->data < newnode->data) {
  prev = tptr;
  tptr = tptr->next;
}

A C-style for loop is rather a while loop. Expressing it in Python with a for construct would be certainly possible (e.g., writing a for loop that runs forever and breaking out if the condition is not met), but it would not be best practice.

In Python, I would recommend to express your example with a while loop (unless it is a simple for-loop like iterating over the numbers 0 to n).

edited Aug 11, 2021 at 20:39

answered Aug 11, 2021 at 19:06

Philipp Claßen

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