Python file Handling ,strip(),lstrip(),rstrip(),read() and readline() function usages and Difference Class 12

In [ ]:

#difference read() and readlines()
#read reads and return entire  content in one time ,while readlines read and retunr entire content in list form 

In [ ]:

#difference readline() and readlines()
ans:readline read and return a single line ,while readlines read and retunr all content in line's form 

In [4]:

#Q write a single loop to display all content of a text file 'poem.txt' after removing leading anf trailing whitespace
f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
lns=f.readlines()
for line in lns:
    print(line.strip()) #strip function remove both leading and trailing space from line 

twinkle twinkle
little star
what r wonder

In [15]:

#Q write a single loop to display all content of a text file 'poem.txt' after removing leading anf trailing whitespace
f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
lns=f.readlines()
for line in lns:
    print(line.strip(),end='') #strip function remove both leading and trailing space and eoL also from line 

twinkle twinklelittle starwhat r wonder

In [5]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
lns=f.readlines()
for line in lns:
    print(line.lstrip()) #remove only left side space from line

twinkle twinkle    

little star  

what r wonder   

In [6]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
lns=f.readlines()
for line in lns:
    print(line.rstrip())  #remove right side space and EOL also

    twinkle twinkle
   little star
  what r wonder

In [8]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
lns=f.readlines()
print(lns)  #print Lines in List form 

['    twinkle twinkle    \n', '   little star  \n', '  what r wonder   \n']

In [10]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
lns=f.read()  #read return entire content in one time as found in list
print(lns)  

    twinkle twinkle    
   little star  
  what r wonder   

In [11]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
for line in f:
    print(line)

    twinkle twinkle    

   little star  

  what r wonder   

In [12]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
for line in f:
    print(f.readline())

   little star  

In [14]:

f=open('poem.txt','w')
f.write('    twinkle twinkle    \n')
f.write('   little star  \n')
f.write('  what r wonder   \n')
f.close()
f=open('poem.txt','r')
print(f.read())

    twinkle twinkle    
   little star  
  what r wonder   

In [ ]: