python tutorial - Python with Keyword | Python Keywords - learn python - python programming
- Keywords are special reserved words which convey a special meaning to the compiler/interpreter.
- Each keyword have a special meaning and a specific operation.
- Keywords are the reserved words in Python.
- We cannot use a keyword as variable name, function name or any other identifier. They are used to define the syntax and structure of the Python language.
- In Python, keywords are case sensitive.
- There are 33 keywords in Python 3.3. This number can vary slightly in course of time.
- All the keywords except True, False and None are in lowercase and they must be written as it is. The list of all the keywords are given below.
- The following is a list of keywords for the Python programming language. and del from not while as elif global or with assert else if pass yield break except import print class exec in raise continue finally is return def for lambda try.
- Python is a dynamic language. It changes during time.
- Here are simple rules to define a function in Python. Function blocks begin with the keyword def followed by the function name and parentheses ( ( ) ).
- Any input parameters or arguments should be placed within these parentheses. You can also define parameters inside these parentheses.
|print to console|
|while||controlling the flow of the program|
|for||iterate over items of a collection in order that they appear|
|break||interrupt the (loop) cycle, if needed|
|if||used to determine, which statements are going to be executed.|
|continue||used to interrupt the current cycle, without jumping out of the whole cycle.
New cycle will begin.
|elif||stands for else if.If the first test evaluates to False,then it continues with the next one|
|else||is optional. The statement after the else keyword is executed,
unless the condition is True
|is||tests for object identity|
|not||negates a boolean value|
|and||all conditions in a boolean expression must be met|
|or||at least one condition must be met.|
|import||import other modules into a Python script|
|as||if we want to give a module a different alias|
|from||for importing a specific variable, class or a function from a module|
|def||used to create a new user defined function|
|return||exits the function and returns a value|
|lambda||creates a new anonymous function|
|global||access variables defined outside functions|
|try||specifies exception handlers|
|except||catches the exception and executes codes|
|finally||is always executed in the end. Used to clean up resources.|
|raise||create a user defined exception|
|assert||used for debugging purposes|
|class||used to create new user defined objects|
|exec||executes Python code dynamically|
|yield||is used with generators.|