practical file

PracticalFileQuestion/Q12.py

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+# Write a program in python, to create two number lists a and b .
+# Swap and display all elements of both lists.
+
+list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 18, 20]
+list2= [13,14,15,18,34,45,56,768,89,890,78]
+
+list1, list2 = list2,list1
+print(list1)
+print(list2)

PracticalFileQuestion/Q13.py

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+# Write a UDF in python, it will take two arguments list
+# (sequence of elements) and its size . 
+# Replace and display first half elements with second half elements of a list.
+# For example:  list elements are:	1	2	3	4	5
+# Output is:	4	5	3	1	2
+
+list1 = [1,2,3,4,5]
+n = len(list1)
+for i in range(n//2):
+  list1[i],list1[n//2+1+i]= list1[n//2+1+i],list1[i]
+print(list1)

PracticalFileQuestion/Q14.py

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+# Write a UDF in python, it will take two arguments list(sequence of elements)
+# and its size.	Function arrange and display elements in ascending order.
+# Using selection sort.
+
+def insertion_sort(list1):
+  n = len(list1)
+  for i in range(1,n):
+    temp = list1[i]
+    j = i-1
+    while j>=0 and temp<list1[j]:
+          list1[j+1]= list1[j]
+          j = j-1
+    list1[j+1]= temp
+  return list1
+
+# function implementation
+list1 = [43,3,1,23,45,45,6,7,8,89,34,78]
+list1 = insertion_sort(list1)
+print(list1)

PracticalFileQuestion/Q15.py

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+# Write a function in PYTHON that counts the number of “Me” or “My” words present in a 
+# text file “DIARY.TXT”. If the “DIARY.TXT” contents are as follows:
+# My first book was Me and My Family. It gave me chance to be Known to the world.
+# The output of the function should be:
+# Count of Me/My in file: 4
+
+def count_me_my():
+  file = open('C:/python/PracticalFileQuestion/diary.txt', 'r')
+  data = file.read().split()
+  count = data.count('Me') +data.count('me') + data.count('My')+data.count('my')
+  file.close()
+  print('Count of me or My :',count)
+
+#function call
+count_me_my()

PracticalFileQuestion/Q16.py

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+#Write a function in PYTHON to read the contents of a text file “Places.Txt” 
+# and display all those lines on screen which are either starting with ‘P’ or with ‘S’.
+def line_count():
+  file = open('C:/python/PracticalFileQuestion/diary.txt', 'r')
+  count =0
+  for line in file.readlines():
+      if line[0]=='P' or line[0]=='S':
+        count+=1
+        print(line) 
+  file.close()
+  print('Total lines :',count)
+
+#function implementation
+line_count()

PracticalFileQuestion/Q17.py

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+# Write a function EUCount() in PYTHON, which should read each character
+# of a text file IMP.TXT, should count and display the occurrences of 
+# alphabets E and U (including small cases e and u too).
+
+def EUcount():
+  file = open('C:/python/PracticalFileQuestion/diary.txt', 'r')
+  count = 0
+  for x in file.read():
+      if x in 'EeUu':
+        count+=1
+  file.close()
+  print('Total E or U in file :',count)
+
+#function implementation
+EUcount()

PracticalFileQuestion/Q18.py

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+# Write a function in PYTHON to search for a BookNo from a binary file 
+# “BOOK.DAT”, assuming the binary file is containing the records of the
+#  following type: ("BookNo", "Book_name"). 
+# Assume that BookNo is an integer.
+import pickle
+
+tno = int(input('Enter book no to search :'))
+file = open('C:/python/PracticalFileQuestion/book.dat', 'rb')
+found=0
+while True:
+
+    try:
+      data = pickle.load(file)
+      if data['bookno']==tno:
+        found=1
+        print(data)
+    except:
+      break
+file.close()
+print("Book found" if found==1 else "Book Not Found")

PracticalFileQuestion/Q18_pre.py

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+#program to create a binary file having records of book in the format
+# {'bookno','book_name'}
+import pickle
+
+file = open('C:/python/PracticalFileQuestion/book.dat', 'ab')
+book ={}
+while True:
+      no = int(input('Enter book no :'))
+      name = input('Enter book no :')
+      book['bookno'] = no
+      book['book_name'] = name
+      pickle.dump(book,file)
+      choice = input('Add more books(y/n) :').upper()
+      if choice =='N':
+        break
+file.close()
+print('Binary file creation complete.....')

PracticalFileQuestion/Q19_stack.py

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+# Write a function in Python for PushS(List) and for PopS(List) for performing 
+# Push and Pop operations with a stack of List containing integers.
+
+def push(stack):
+  value = int(input('Enter any integer no :'))
+  stack.append(value)
+
+def pop(stack):
+  if len(stack)<=0:
+    print('\n Stack Underflow')
+  else:
+    print('\nPoped value from stack :',stack.pop())
+
+def display(stack):
+  print('\n\nStack Elements : ')
+  for x in stack:
+    print(x, end=' ')
+
+#implementation of function to show stack
+stack=[]
+while True:
+  print('\n  STACK MENU')
+  print('1. Push')
+  print('2. Pop')
+  print('3. Display ')
+  print('4. Exit')
+  choice = input('Enter your choice :')
+  if choice=='1':
+      push(stack)
+  if choice=='2':
+      pop(stack)
+  if choice=='3':
+      display(stack)
+  if choice=='4':
+      break
+
+
+

PracticalFileQuestion/Q20_queue.py

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+# Write a function in Python for PushS(List) and for PopS(List) for performing
+# Push and Pop operations with a queue of List containing integers.
+
+
+def insert_element(queue):
+  value = int(input('Enter any integer no :'))
+  queue.append(value)
+
+
+def delete_element(queue):
+  if len(queue) <= 0:
+    print('\n Queue Underflow')
+  else:
+    print('\nDeleted Elment from from Queue :', queue.pop(0))
+
+
+def display(queue):
+  print('\n\nQueue Elements : ')
+  for x in queue:
+    print(x, end=' ')
+
+
+#implementation of function to show queue
+queue = []
+while True:
+  print('\n  QUEUE MENU')
+  print('1. Insert Element')
+  print('2. Delete Element')
+  print('3. Display ')
+  print('4. Exit')
+  choice = input('Enter your choice :')
+  if choice == '1':
+      insert_element(queue)
+  if choice == '2':
+      delete_element(queue)
+  if choice == '3':
+      display(queue)
+  if choice == '4':
+      break

PracticalFileQuestion/Q21_csv_file_handling.py

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+# Write a menu-driven program implementing user-defined functions to perform 
+# different functions on a csv file “student” such as:
+# (a)	Write a single record to csv.
+# (b)	Write all the records in one single go onto the csv.
+# (c)	Display the contents of the csv file.
+import csv
+
+def single_record():
+  file = open('C:/python/PracticalFileQuestion/student.csv', 'a')
+  admno = int(input('Enter admno :'))
+  name = input('Enter name :')
+  std = input('Enter standard :')
+  writer = csv.writer(file,lineterminator='\n')
+  writer.writerow([admno,name,std])
+  file.close()
+
+
+def multiple_records():
+  file = open('C:/python/PracticalFileQuestion/student.csv', 'a')
+  data=[]
+  while True:
+    admno = int(input('Enter admno :'))
+    name = input('Enter name :')
+    std = input('Enter standard :')
+    data.append([admno,name,std])
+    choice= input('Add more records(y/n) :').upper()
+    if choice =='N':
+      break
+
+  writer = csv.writer(file, lineterminator='\n')
+  writer.writerows(data)
+  file.close()
+
+def read_csv_file():
+  file = open('C:/python/PracticalFileQuestion/student.csv', 'r')
+  reader = csv.reader(file)
+  for line in reader:
+      print(line)
+  file.close()
+
+while True:
+  print('\n\n CSV File Handling')
+  print('1. Write Single Record')
+  print('2. Write multiple Records')
+  print('3. Read Whole CSV file ')
+  print('4. Close Application')
+  choice=input('Enter your choice :')
+  if choice=='1':
+    single_record()
+  if choice=='2':
+    multiple_records()
+  if choice=='3':
+    read_csv_file()
+  if choice=='4':
+    break

PracticalFileQuestion/Q22_binary_file.py

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+# Write a menu-driven program to perform all the basic operations using dictionary on student
+#  binary file such as inserting,reading, updating, searching and deleting a record.
+
+import pickle
+import os
+
+
+def insert_record():
+  file = open('C:/python/PracticalFileQuestion/binary.dat', 'ab')
+  admno = int(input('Enter admno :'))
+  name = input('Enter name :')
+  std = input('Enter standard :')
+  student={'admno':admno,'name':name,'std':std}
+  pickle.dump(student,file)
+  file.close()
+  print('Record added successfully........')
+
+
+def read_records():
+  file = open('C:/python/PracticalFileQuestion/binary.dat', 'rb')
+  while True:
+    try:
+      data = pickle.load(file)
+      print(data)
+    except:
+      break
+  file.close()
+
+
+def delete_record():
+  file = open('C:/python/PracticalFileQuestion/binary.dat', 'rb')
+  temp = open('temp.dat', 'wb')
+  tadmno = int(input('Enter admission no to delete :'))
+  while True:
+    try:
+      data = pickle.load(file)
+      if data['admno'] != tadmno:
+        pickle.dump(data, temp)
+    except:
+      break
+  file.close()
+  temp.close()
+  os.remove('C:/python/PracticalFileQuestion/binary.dat')
+  os.rename('temp.dat', 'C:/python/PracticalFileQuestion/binary.dat')
+  print('Record updated......')
+
+
+def update_record():
+  file = open('C:/python/PracticalFileQuestion/binary.dat', 'rb')
+  temp = open('temp.dat','wb')
+  tadmno = int(input('Enter admission no to update :'))
+  while True:
+    try:
+      data = pickle.load(file)
+      if data['admno']==tadmno:
+         data['name'] = input('Enter new name :')
+         data['std'] = input('Enter new standard :')
+      pickle.dump(data,temp)
+    except:
+      break
+  file.close()
+  temp.close()
+  os.remove('C:/python/PracticalFileQuestion/binary.dat')
+  os.rename('temp.dat', 'C:/python/PracticalFileQuestion/binary.dat')
+  print('Record updated......')
+
+
+def search_record():
+  file = open('C:/python/PracticalFileQuestion/binary.dat', 'rb')
+  tadmno = int(input('Enter admno to search :'))
+  found=0
+  while True:
+    try:
+      data = pickle.load(file)
+      if data['admno']==tadmno:
+         found =1
+    except:
+      break
+  file.close()
+  print('Record found ' if found==1 else 'Record not found ')
+
+while True:
+  print('\n\n Binary File Handling')
+  print('1. Insert Record')
+  print('2. Delete Records')
+  print('3. Update Record ')
+  print('4. Search Record ')
+  print('5. Read all Records ')
+  print('6. Close Application')
+  choice = input('Enter your choice :')
+  if choice == '1':
+    insert_record()
+  if choice == '2':
+    delete_record()
+  if choice == '3':
+    update_record()
+  if choice == '4':
+    search_record()
+  if choice== '5':
+    read_records()
+  if choice== '6':
+    break

PracticalFileQuestion/diary.txt

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+My first book was Me and My Family. 
+It gave me chance to be Known to the world.
+Passing criteria is not always same
+Same if the line contains p or s

PracticalFileQuestion/student.csv

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+1,rakesh,12
+2,anmol,11
+3,subodh,10
+4,ravi,10

PracticalFileQuestion/tempCodeRunnerFile.py

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+ temp = list1[i]