Python Array Data Structure

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A Python Array Data Structure is an array data structure that is a Python data structure.



References

Examples

Import libraries
import numpy as np
import pandas as pd
Empty array
df = pd.DataFrame(columns=['col1','col2'])
df = pd.DataFrame(np.zeros(0, dtype=[('col1', 'i7'),('col2', 'a50')]))
Populate manually
Matrix = [ [0 for x in xrange(5)] for y in xrange(6)] 
Matrix[4][3] = 99
Matrix

xx =  np.array([2, 4, -11])
yy = zeros(3, Int)        # Create empty array ready to receive result
Populate from a file.

Loops
for i in range(0, 3):
  Matrix[i] = i * 2
print yy
#    [  4   8 -22]
Transforming into a string

Emptying

Random
import random;
#Generate 1000 random integer numbers which are between 1 and 9999(included).
Z=random.sample(range(1,9999),1000);
type(Z)