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devdoradevdora
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dictionary, tuples, list and sets with basic codes
1 parent da70619 commit 37625f9

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‎DataStructure/Dictionary.py‎

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tel={'jac':1,'sym':2}
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tel['u']=3
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tel['c']=4
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print(tel)
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print(tel['jac'])
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del tel['c']
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print(tel)
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tel['x']=5
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tel['b']=7
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sorted(tel)
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print(tel)
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w=dict([('hello',1),('yes',2),('you',3)])
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print(w)
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#dict compreshensions
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print(x: x**3 for x in (3,4,5))
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for k in knights.items():
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print(k)
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for w,e in enumerate(knights):
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print(w,e)
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for r,y in enumerate([1,2,34,45]):
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print(r,y)
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x=list(knights)
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print(x)
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print(sorted(knights))
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print('gm' in knights)
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print('ritu' in knights)
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question=['a','b','c','d']
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print(type(question))
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answer=['one','two','three']
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for a,b in zip(question,answer):
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print(a,b)
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for x in zip(question,answer):
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for c in x:
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print(c,x)
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print(type(x),type(c))
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#traversed through both the values
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b="my name is z"
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knights={'hello':'ritu','gm':'rishabh sir'}
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i=[9,4,6,2,3]
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#problem occured
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p=set(i)
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print(p)
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for i in knights.items():
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print(i)
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print(i)
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#cz python is a interpreter language
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for j in i:
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print(j)
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print(j)
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#problem till here
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te=1,3,5,7,9
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for c in reversed(range(1,10,2)):
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print(c)
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basket=['set','pen','bat','hello','table','pen']
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n={x : x*2 for x in basket }
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for q,w in n.items():
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print(q,w)
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‎DataStructure/Sets.py‎

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#a set is unordered collection with no duplicate elements
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k={'a','b','c'}
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x={'a','v','w','b','c','q'}
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print(k<x)
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print(x<k)
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print(x | k)
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print(x & k)
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print(x ^ k)
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print(x-k)
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#with update()
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#can be used with set but cant be used withj frozenset
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x |= k
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print(x)
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x &= k
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print(x)
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#print(x ^=k)
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#print(x -=k)
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x.add('d')
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print(x)
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x.remove('a')
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x.discard('c')
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x.discard('h')
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x.pop()
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x.clear()
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#set comprehensions
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a={x for x in 'abracadabra' if x not in 'abc'}
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print(a)
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vowels={'a','e','i','o','u'}
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fset=frozenset(vowels)
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print(fset)
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print(vowels | k)

‎DataStructure/Tuples.py‎

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t= 1234,235,'hello'
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print(t[0])
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print(t)
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u= t, 1,2,3,4
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print(u)
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v=t, (12,23,4,56,7)
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print(v)
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#an empty tuple
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e=()
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#a tuple and it require trailing comma
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s='hello','group',
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print(len(e))
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len(s)
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#tuple is immutable
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#sequesce or tuple packing
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t=1,2,3,45,6
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#sequence unpacking
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v,b,n,m,j=t
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#now these v=1 whhere v will have type int, and so on
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t=(1,2,3),(1,2,3),(3,4,56)
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q,w,r=t
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#in this case q will have type tuple
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#initializing tuple with one value
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o=1,
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‎DataStructure/list.py‎

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#methods of list
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a=['hello','I','am','ritu','soni','I','am','happy']
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#append
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a.append(3)
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print(a)
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a.append(34)
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a.append(4.45)
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a.append(len(a))
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a.append(True)
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print(a)
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x=a.append(56) #extend and append do not return anything x is none
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print(x)
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#extend(iterable)
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b=[1,2]
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x=a.extend(b)
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print(x)
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a.extend(b)
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print(a)
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#insert
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a.insert(1,0)
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print(a)
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#remove parameter = value that we want to remove
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a.remove('hello')
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a.remove(1)
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a.remove(2)
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#pop parameter = index that we want to pop element from.
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x=a.pop(8)
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print(x)
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#it removes the element from the list and return it
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print(a)
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#a.clear() clears whole list
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#index
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v=a.index('ritu',2)
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print(v)
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#count
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c=a.count(1)
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print(c)
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# cant sort the list with mixed values of str and int by a.sort()
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a.reverse()
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print(a)
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c=a.copy()
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print(c)
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z=[1,2,3,4,5,6]
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print(z[-6:-3])
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print(z[:])
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‎session2/WhileElse.py‎

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i=int(input("Enter int: "))
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count =0
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while i<10:
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count=count+1
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print(count)
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i=i+2
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else:
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print("end while")

‎session2/break cont pass.py‎

Whitespace-only changes.

‎session2/check prime no.py‎

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""" if the for loop is breaked by break than the else statement
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of for will not be executed"""
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"""for n in range (2,10):
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print('n=',n)
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for x in range(2,n):
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print('x=',x)
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if n%x==0:
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print(n,'equals',x,'*',n//x)
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break
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else:
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print(n,'is prime no')
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"""
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x=int(input("enter inetger"))
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if(x==2 or x==3):
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print("prime no.")
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else:
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for i in range(x):
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if(6*i+1 == x or 6*i-1 ==x):
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print("prime")
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break
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else :
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print("not prime")

‎session2/decision making.py‎

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y=int(input("please enter int "))
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if y<0 :
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y=0
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print("negative value")
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elif y==0 :
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print("zero")
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elif y==1 :
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print("single")
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else :
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print("more")
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words=['cat','window','def']
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inte=[1,2,3]
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for w in words :
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for x in inte:
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print(w,len(w),x)
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‎session2/for practice.py‎

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words=['cat','window','def']
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for w in words:
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print(w, len(w))
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for w in words[:]:
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if len(w)>4:
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words.insert(0,w)
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print(words)
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print(range(0,5))
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#this will print only range(0,5)
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# to print values we write
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print(list(range(0,6)))
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"""the else keyword in for loop specifies
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a block of code to be executed
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after the loop is finished"""
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for i in range(4):
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print(i)
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else:
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print("finally executed")
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‎session2/leap year.py‎

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yr=int(input("enter year to be checked"))
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if(yr%400==0 & yr%100==0 & yr %4==0):
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print("leap")
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else :
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print("not leap")

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