python

Author: RyomenDev

_05_list.py

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+
+# list == mutable
+
+
+nums=[23,56,45,65]
+print(nums)
+
+mix=[23,'berlin',12.5]
+
+print(nums,mix)
+
+add=[nums,mix]
+print(add)
+
+# nums.append , insert , remove , pop
+# del nums[2:4]   nums.extend([34,56,67])
+#min(nums), max, sum ,nums.sort

_06_Dictionary.py

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+
+# key =immutale
+
+data = {1:'yes',2:'no'}
+print(data[1])  #data[key
+print(data.keys())
+print(data.values())
+
+print(data.get(2))
+print(data.get(2,'not found'))
+print(data.get(3,'not found'))
+
+keys=['a','b','c']
+values=['python','java','javascript']
+
+data=dict(zip(keys,values))
+
+print(data)
+print(data['a'])
+
+data['d']='cs'
+del data['b']
+
+print(data)
+
+prog={'js':'atom','cs':'vs','python':['pycharm','sublime'],'java':{'jse':'netbeans','jee':'eclipse'}}
+
+print(prog)
+print(prog['python'][1])
+print(prog['java'])
+print(prog['java']['jee'])

_06_tuple.py

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+
+# tuple == immutable  , itteration is faster than list
+
+tup=(23,45,21,34)
+
+print(tup[1])
+
+# tup.
+
+s={22,56,32,89,54}   # set
+print(s) #random value usinh hash
+# index thing not suppoerted

_09_variables.py

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+num=6
+print(id(num))
+
+name='a'
+print(id(name))
+
+b=10
+c=b
+d=10
+# if values are same -variable address alose same - memory efficient
+print(id(b))
+print(id(c))
+print(id(d))
+print(id(10))
+
+print(type(num))
+

_10_data_types.py

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+
+# none numeric(int float complex bool) list tuple set string range dictionary
+# complex = a+9j  j=root(-1)
+
+
+# range to list
+print(range(10))
+print(list(range(10)))
+
+print(list(range(2,10,2)))
+print(type(range(10)))
+print(type(range))

_11_operators.py

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+x=6
+x+=2
+print(x)
+
+a,b=3,7
+print(a,b)
+
+# relational opeartor
+# logical opeartor
+print(a<7 and b<6)

_12numberSystem.py

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+
+# decimal to binary
+print(bin(25))
+print(bin(-25))
+
+print(0b0101)
+
+print(oct(25))
+print(hex(25))

_13_swap.py

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+
+
+a=6
+b=4
+print(a,b)
+
+a,b=b,a
+print(a,b)
+
+c=7
+d= 9
+print(c,d)
+
+c=c+d
+d=c-d
+c=c-d
+print(c,d)
+
+e=11
+f=14
+print(e,f)
+# x-or
+e=e^f
+f=e^f
+e=e^f
+print(e,f)
+

_15_bitwise.py

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+
+print(~12)  # compliment -- reverse
+
+print(12 & 13)
+print(12 | 13)
+
+print(12^13)
+
+print(12<<2) # left shift
+
+print(12>>2) # right shift

_16_math_function.py

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+import math
+x = 25
+print(math.sqrt(x))
+
+print(math.floor(2.51))
+print(math.floor(2.6))
+# floor - min ; ceil - max
+print(math.ceil(2.51))
+print(math.ceil(2.2))
+
+print(math.pow(2,5))
+
+print(math.e)
+
+import math as m  # concept of allies
+print(m.pi)
+
+from math import sqrt,pow  # specific functions
+print(pow(3,4))
+

_17_run_debug.py

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+
+x=6
+y=7
+z=x+y
+print(z)

_18_user_input.py

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+
+# x=input("x=")
+# y=input("y=")
+# z = x + y
+# print(z)
+#
+#
+# a=int(x)
+# b=int(y)
+# y=a+b
+# print(y)
+#
+# ch=input('char=')
+# print(ch[0])
+#
+# cha=input('char=')[0]
+# print(cha)
+
+# result=eval(input('enter expression:'))
+# print(result)
+
+# agrv= argument values
+# python filename.py input1 input2
+# index no.  [1]        [2]     [3]
+
+import sys
+u=int(sys.argv[1])
+v=int(sys.argv[2])
+w=u+v
+print(w)

_19_if_elif.py

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+
+# follow indentation
+
+# x=int(input("x="))
+#
+# if(x%2==0):
+#     print("even")
+#     if(x>5):
+#         print(">5")
+#     else:
+#         print("<5")
+# else:
+#     print("odd")
+#
+y= int(input("y="))
+if(y==1):
+    print("1")
+elif(y==2):
+    print("2")
+elif(y==3):
+    print("3")
+elif(y==4):
+    print("4")
+elif(y == 5):
+    print("5")
+else:
+    print("none")

_20_while_loop.py

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+
+i=0
+
+while(i<5):
+    print(i,end=" ")
+    j = 0
+    while(j<3):
+        print(j,end=" ")
+        j+=1
+    print()
+    i+=1

_21_for_loop.py

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+
+# for = sequene string
+
+x=['a',45,7.6]
+# i=elements x
+for i in x :
+    print(i)
+
+y="Berlin"
+for i in y :
+    print(i)
+
+for i in ['a',45,7.6]:
+        print(i)
+
+for i in range(5,10,2): # 5 to 9
+    print(i)
+
+for j in range(20,10,-2):
+    print(j)

_22_break_continue_pass.py

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+
+# continue --> skip ; break -> loop break ; pass --> empty condition
+
+# x=int(input(":::="))
+# av=10
+# i=1
+#
+# while i<=x:
+#     if x>av:
+#         print("not available")
+#         break
+#     print(i)
+#     i+=1
+
+# for i in range(1,20):
+#     if i%3==0 or i%5==0:
+#         continue
+#     else:
+#         print(i)
+
+for i in range(1,20):
+    if i%2!=0:
+        pass
+    else:
+        print(i)

_23_pattern.py

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+
+
+for i in range(4):
+    for j in range (4):
+        print('#',end=" ")
+    print()

_24_for_else.py

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+
+# nums=[10,12,56,34,67,23,45]
+nums=[12,56,34,67,23]
+
+
+for num in nums:
+
+    if num%5==0:
+        print(num)
+        break
+else:
+    print(('not found'))

_25_prime_num.py

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+
+
+import math
+
+num=int(input("num="))
+
+x=math.sqrt(num)
+y=int(x)
+
+i=2
+
+while i<=y:
+    if num%i==0:
+        print('not prime')
+        break
+    # elif i==y:
+    # # else:
+    #     print('prime')
+    i+=1
+else:
+    print('prime')
+

_26_array.py

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+from array import *
+# import array
+
+
+'''
+b   signed char        int              1byte
+B   unsigned char      int              1
+u   Py_UNICODE         UNICODE char     1
+h   signed short       int              2
+H   unsigned short     int              2
+i   signed int         int              2
+I   unsigned int       int              2
+l   signed long        int              4
+L   unsigned long      int              4
+d   double             int              4
+f   float              int              8
+'''
+
+vals = array('i',[3,5,6,7,8])
+
+print(vals)
+print(vals.buffer_info())
+vals.reverse()
+print(vals)
+
+# for e in vals:
+#     print(e)
+va=array('i',[3,4,5,4,2,8])
+newar=array(va.typecode,(a*a for a in va))
+print(newar)