Sequence data storage data structure
python
Lists, tuples, dictionaries, collections, strings
sequence:
Storing a plurality of values for a contiguous memory space, and arranged in a certain order, or by an index value
Index (number):
Indices may be negative
Left to right, starting from 0
From right to left starting at -1
slice
List name [start value: End value: step]
Start value from 0
End value required to obtain bits +
Step bit without writing 0
Sequences are added
2 + 1 sequence Sequence 1 Sequence 2 Sequence =
Only the same type of sequences are added
List + List
+ Tuples tuple
String + String
Sequence multiplication
* = Multiplier sequence is repeated N times in sequence
The content of the sequence is repeated N times
Check whether an element is a member of the sequence
Keyword in sequence
Keywords not in sequence
Calculated sequence length, maximum, minimum
len () length
max () maximum
min () Min
list () is converted to the sequence list
str () converts the string
sum calculation and
sorted () to sort the elements
the reversed () inverted sequence elements
the enumerate () sequence into the sequence index