List and Array in Python: القوائم والمصفوفات في البايثون смотреть онлайн

List and Array in Python
توضيح للقوائم والمصفوفات في بايثون..

#Examples:

a=[1,5,3,4,2]

b=[6.0,7,'Hi ','Good']

c=[8]

c1=['x','d','a','m']

c2=b[3]
print('the index 3 value is ',c2) # index starting from 0
c3=b[-3]
print('the third element from the last element',c3) # the last number index is -1
d=a+b+c # concatination if list is used
ab=a+c

d.append('morning') #Adding Element to the list
print('the content of d before removing item',d) # before removing item
d1=d.pop(7) # removing the element number 7

print(d1)
print('the content of d AFTER removing item',d)

print(len(d)) # the number of elements in a list

d2=d.count('Good')
d3=d.copy()
d.insert(3, 99)

a.sort()
a1=a.copy()
a.reverse()
d.clear()
#%%
e=list(range(10)) # sequence from 0 to 9
e=list(range(1,100,10)) # sequence from 0 to 100 by increment of 10
print(e)
f=e[4:6] # Always the end element not included
print(f)
f1=e[4:] # to end
print(f1)
f2=e[:4] # from the begning to item number 4
print(f2)
f3=max(f)
print(f3) # or min


f4=sum(e) #
f5= len(e)
f6=f4/f5 # average or mean of list

#%%
# attention
f7=2*f # concatnation doblicate the size of f
# to use multiplication of list use numpy
print(f7)

#%%

# Two diensional list
x=[[1,2],[3,4],[6,7],[8,9]]
x1=x[2]
x2=x[1][0]

print(x1)
print(x2)
x.insert(1, [33,55])
x.reverse()
#%% numpy
import numpy as np
x1=[1,2,3,4,5]
x2=np.mean(x1) # or min, max
print(x2)
x3=[[1,3,0,4,5],[4,5,6,9,0.5],[14,15,16,17,10.5]] # List

x4=x3[2][3]


x5=np.array(x3) # Converted to numpy Array
x6=x5[2,3]
x6=x5[2][3]




x7=np.mean(x3)

x8=np.mean(x5)

x9=np.sum(x5)
print(x9)