Python Pass detailed introduction and instance code _python

Usage of Python Pass:

1. Empty statement do nothing
2. Guaranteed Format Integrity
3. Ensure semantic integrity

Take the IF statement as an example, in C or C++/java:

if (true)
;  Do nothing
else
{
  //do something
}

This corresponds to Python:

If true: Pass
  #do Nothing
else:
  #do Something

The role of 1 pass statement in function

When you write a program, the execution of the statement part of the idea has not been completed, then you can use the PASS statement to occupy a bit, but also as a token, is to be completed after the code. Let's say this:

Def Iplaypython (): Pass
  

Define a function Iplaypython, but the function body part is not completed temporarily, and cannot empty not write content, so can use pass to replace occupies a position.

The function of 2 pass statement in circulation

Pass is also often used to write an empty body for a compound statement, for example, if you want an infinite loop of a while statement that requires no action for each iteration, you can write:

While True: Pass
  

Just for example, it's best not to write code like this, because the execution code block does nothing for pass, where Python goes into a dead loop.

Thank you for reading, I hope to help you, thank you for your support for this site!