Keywords are the reserved words present in all programming languages .Python has a list of keywords that cannot be used as function names or identifiers (variable names) .Python is a dynamic language , so the list of keywords may change in future. Currently, there are 33 keywords in Python 3.3 . Trying to use any of these keywords as variables will create a Syntax Error and your Python script will not run:
>>> False = "Hello campers!"
File "<ipython-input-27-22bd50eb1a1a>", line 1
False = "Hello campers!"
^
SyntaxError: can't assign to keyword
>>> break = "Hello campers!"
File ""<ipython-input-28-e668b2a47f09>"", line 1
break = "Hello campers!"
^
SyntaxError: invalid syntax
>>> class = "Hello campers!"
File "<ipython-input-29-189cc6451267>", line 1
class = "Hello campers!"
^
SyntaxError: invalid syntax
List of Keywords
| Keyword | - | - | - | - |
|---|---|---|---|---|
False |
class |
finally |
is |
return |
None |
continue |
for |
lambda |
try |
True |
def |
from |
nonlocal |
while |
and |
del |
global |
not |
with |
as |
elif |
if |
or |
yield |
assert |
else |
import |
pass |
|
break |
except |
in |
raise |
All the keywords except True , False and None are in lowercase as shown above.