Priority of Python logical operations

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1. And 'and'

If the left side of the and is False, the left result (False) is returned directly; if the left side of the and is True, the returned result depends on the value on the right. You need true on both sides to return true;. The right side is false, so false is returned as a whole.

2. Or'or'

If the left side of the or is True, the left result (True) is returned directly; if the left side of the or is False, the returned result depends on the value on the right. As long as one side is true, true; will be returned. Although the right side is false, the overall true will be returned.

3. Not 'not'

Not is easy to understand, which is a reverse operation. You need true on both sides to return the current reverse of true;. Currently, false is returned for true, and true is currently returned for false.

For example: not True---- > False;not False--- > True

4. Examples:

# and or not

# priority, () > not > and > or

# print (2 > 1 and 1

< 4) # print(2 >

1 and 1

< 4 or 2 < 3 and 9 >

6 or 2

< 4 and 3 < 2) # T or T or F #T or F # print(3>

4 or 42) # T

# print (2 > 1 and 3

< 4 or 4 >

5 and 2

< 1) # T # print(1 >

2 and 3

< 4 or 4 >

5 and 2 > 1 or 9

< 8) # F # print(1 >

1 and 3

< 4 or 4 >

5 and 2 > 1 and 9 > 8 or 7

< 6) # F # print(not 2 >

1 and 3

< 4 or 4 >

5 and 2 > 1 and 9 > 8 or 7

< 6) # F #ps int ---->

Bool non-zero conversion to bool True 0 conversion to bool is False

# print (bool (2))

# print (bool (- 2))

# print (bool (0)

# # bool-- > int

# print (int (True)) # 1

# print (int (False)) # 0

"''x or y x True, then return xdistinct'"

# print (1 or 2) # 1

# print (3 or 2) # 3

# print (0 or 2) # 2

# print (0 or 100) # 100

# print (2 or 100 or 3 or 4) # 2

# print (0 or 4 and 3 or 2)

'x and y x True, then return yawness.'

# print (1 and 2)

# print (0 and 2)

Print (2 or 1

< 3) print(3 >

1 or 2 and 2)

5. Priority of logical operation

The priority of the operator is not > and > or. This priority knowledge point will be applied to the composite operation in the same way as addition, subtraction, multiplication and division. And has a high priority in or and and. If the priority of or is greater than and, the priority of not in false,not and and should be high; if the priority of and is higher than not, true should be returned.

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