LATTEOTW

Range

From Python official document:

class range(stop)

class range(start, stop[, step])

Rather than being a function, range is actually an immutable sequence type, as documented in Ranges and Sequence Types >— list, tuple, range.

Range is a little bit different than all other built-in functions. It’s essential a data type that’s built-in in Python. More specifically, it shares the same feature of list and tuple - it’s sequential. Let’s introduce some features and usage of range.

• Start is inclusive and stop is exclusive

  1 2	for i in range(1, 3, 1): print(i)

  This will print:

  1 2

  1 2

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List Concatenation

There are two ways two concatenate a list with another. One is to use + to concatenate a list. Another way is to use extend() function to concatenate

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# Use + to concatenation a list
A = ['a', 'p', 'p', 'l', 'e']
B = ['b', 'a', 'n', 'a', 'n', 'a']
C = A + B
print(C) # ['a', 'p', 'p', 'l', 'e', 'b', 'a', 'n', 'a', 'n', 'a']

# Use extend() function to concatenate
A.extend(B)
print(A) # ['a', 'p', 'p', 'l', 'e', 'b', 'a', 'n', 'a', 'n', 'a']