A detailed description of tuples and logical operators in Python

python tuples
A tuple is another data type, similar to a list.
The tuple is identified with a "()". The inner elements are separated by commas. However, an element cannot be assigned two times, which is equivalent to a read-only list.

#!/usr/bin/python#-*-coding:utf-8-*-tuple = (' ABCD ', 786, 2.23, ' John ', 70.2) Tinytuple = (123, ' John ') print tuple # Output full tuple print tuple[0] # The first element of the output tuple print Tuple[1:3] # outputs the second to third element of print tuple[2:] # Outputs all elements from the third start to the end of the list print Tinytuple * 2 # output tuple two times print tuple + tinytuple # printing combination of tuples

The result of the above example output:

(' ABCD ', 786, 2.23, ' John ', 70.2) ABCD (786, 2.23) (2.23, ' John ', 70.2) (123, ' John ', 123, ' John ') (' ABCD ', 786, 2.23, ' John ', 70.2, 123, ' John ')

The following are tuples that are not valid because tuples are not allowed to be updated. And the list is allowed to be updated:

#!/usr/bin/python#-*-coding:utf-8-*-tuple = (' ABCD ', 786, 2.23, ' John ', 70.2) list = [' ABCD ', 786, 2.23, ' John ', 7 0.2]tuple[2] = 1000 # tuples are illegal to apply list[2] = 1000 # is a legitimate application in the list

Python logical operators
The Python language supports logical operators, with the following assumption that variable A is 10 and variable B is 20:

The following example shows the operation of all the logical operators of Python:

#!/usr/bin/pythona = 10b = 20c = 0if (A and B):  print "line 1-a and B is true" else:  print "line 1-either a Is isn't true or B is not true "if (A or B):  print" line 2-either A was true or B is true or both is true "else:  P Rint "Line 2-neither A is true nor B was true" a = 0if (A and B):  print "line 3-a and B is true" else:  print " Line 3-either A isn't true or B is not true "if (A or B):  print" line 4-either A was true or B is true or both AR E true "else:  print" line 4-neither A are true nor B is true "if not (A and B):  print" line 5-either A is not tr UE or B is not true, or both is isn't true "else:  print" line 5-a and B is true "

The result of the above example output:

Line 1-a and B being Trueline 2-either A is true or B is true or both be Trueline 3-either A is isn't true or B is not Trueline 4-either A is true or "B is true" or both is Trueline 5-either "is" is "not true" or "B is not true" or both is not True

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