n=int(raw_input('Enter the n for sum of n numbers: '))
f=open('integers.txt','w')
for count in range(n+1):
f.write(str(count)+"\n")
f.close()
f=open('integers.txt','r')
sum=0
for l in f:
l=l.strip()
number=int(l)
sum+=number
print 'The sum is',sum
Solve Problems by Coding Solutions - A Complete solution for python programming
Writing and reading integers from a file
f=open('myfile.txt','w')
for count in range(5):
f.write(str(count))
f.close()
f=open('myfile.txt','r')
t=f.read()
print t
for count in range(5):
f.write(str(count))
f.close()
f=open('myfile.txt','r')
t=f.read()
print t
Writing and reading string from a file
f=open('myfile.txt','w')
f.write('\n Image Processing Research Group \n www.iprg.co.in \n')
f.close()
f=open('myfile.txt','r')
text=f.read()
print text
f.write('\n Image Processing Research Group \n www.iprg.co.in \n')
f.close()
f=open('myfile.txt','r')
text=f.read()
print text
Basic operations in Python List
l=[]
n=int(raw_input('Enter the no of elements added to list:'))
for i in range(n):
element=int(raw_input('Enter the elements:'))
l.append(element)
print '\nNew List is ',
m=int(raw_input('\nEnter the no of elements added to list using insert:'))
for i in range(m):
u=int(raw_input('Enter the index to be added'))
u1=int(raw_input('Enter the element to be added'))
l.insert(u,u1)
print '\nNew List after insert operation is: ',l
ch=int(raw_input('\nPress 1 to pop the last element\nPress 2 to pop the element in a particular index\nEnter the choice: '))
if ch==1:
l.pop()
print '\nNew List after deletion is: ',l
elif ch==2:
p=int(raw_input('Enter the element index to be deleted'))
l.pop(p)
print '\nNew List after deletion is: ',l
else:
print '\nInvalid choice'
print ' \nList elements are sorted: ',l
n=int(raw_input('Enter the no of elements added to list:'))
for i in range(n):
element=int(raw_input('Enter the elements:'))
l.append(element)
print '\nNew List is ',
m=int(raw_input('\nEnter the no of elements added to list using insert:'))
for i in range(m):
u=int(raw_input('Enter the index to be added'))
u1=int(raw_input('Enter the element to be added'))
l.insert(u,u1)
print '\nNew List after insert operation is: ',l
ch=int(raw_input('\nPress 1 to pop the last element\nPress 2 to pop the element in a particular index\nEnter the choice: '))
if ch==1:
l.pop()
print '\nNew List after deletion is: ',l
elif ch==2:
p=int(raw_input('Enter the element index to be deleted'))
l.pop(p)
print '\nNew List after deletion is: ',l
else:
print '\nInvalid choice'
print ' \nList elements are sorted: ',l
To add elements in list using insert
y=[]
n=int(raw_input('Enter the no of elements added to list:'))
index=0
for i in range(n):
element=int(raw_input('Enter the elements:'))
y.insert(index, element)
index=index+1
print y
n=int(raw_input('Enter the no of elements added to list:'))
index=0
for i in range(n):
element=int(raw_input('Enter the elements:'))
y.insert(index, element)
index=index+1
print y
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