refactor: clean code

Signed-off-by: slowy07 <slowy.arfy@gmail.com>

Author: slowy07

1 File handle/File handle binary/Deleting record in a binary file.py

@@ -1,22 +1,24 @@
 import pickle
 
+
 def Bdelete():
     # Opening a file & loading it
-    F= open("studrec.dat","rb")
+    F = open("studrec.dat", "rb")
     stud = pickle.load(F)
     F.close()
-    
+
     print(stud)
-    
+
     # Deleting the Roll no. entered by user
-    rno= int(input("Enter the Roll no. to be deleted: "))
-    F= open("studrec.dat","wb")
-    rec= []
+    rno = int(input("Enter the Roll no. to be deleted: "))
+    F = open("studrec.dat", "wb")
+    rec = []
     for i in stud:
         if i[0] == rno:
             continue
         rec.append(i)
-    pickle.dump(rec,F)
+    pickle.dump(rec, F)
     F.close()
-    
+
+
 Bdelete()

1 File handle/File handle binary/File handle binary read (record in non list form).py

@@ -1,23 +1,25 @@
 import pickle
 
+
 def binaryread():
-    B=open("studrec.dat","rb")
-    stud=pickle.load(B)
+    B = open("studrec.dat", "rb")
+    stud = pickle.load(B)
     print(stud)
 
     # prints the whole record in nested list format
     print("contents of binary file")
 
     for ch in stud:
-        
-        print(ch) #prints one of the chosen rec in list
-        
-        Rno=ch[0]
-        Rname=ch[1]  #due to unpacking the val not printed in list format
-        Rmark=ch[2]
-
-        print(Rno, Rname,Rmark, end="\t")
-    
+
+        print(ch)  # prints one of the chosen rec in list
+
+        Rno = ch[0]
+        Rname = ch[1]  # due to unpacking the val not printed in list format
+        Rmark = ch[2]
+
+        print(Rno, Rname, Rmark, end="\t")
+
         B.close
 
+
 binaryread()

1 File handle/File handle binary/Update a binary file.py

@@ -1,31 +1,33 @@
-#Updating records in a binary file
+# Updating records in a binary file
 
 import pickle
 
+
 def update():
-    F=open("class.dat",'rb+')
-    S=pickle.load(F)
-    found=0
-    rno=int(input("enter the roll number you want to update"))
+    F = open("class.dat", "rb+")
+    S = pickle.load(F)
+    found = 0
+    rno = int(input("enter the roll number you want to update"))
     for i in S:
-        if rno==i[0]:
-            print("the currrent name is",i[1])
-            i[1]=input("enter the new name")
-            found=1
+        if rno == i[0]:
+            print("the currrent name is", i[1])
+            i[1] = input("enter the new name")
+            found = 1
             break
 
-    if found==0:
+    if found == 0:
         print("Record not found")
 
     else:
-       F.seek(0)
-       pickle.dump(S,F)
+        F.seek(0)
+        pickle.dump(S, F)
+
+    F.close()
 
-    F.close()    
 
 update()
 
-F=open("class.dat","rb")
-val=pickle.load(F)
+F = open("class.dat", "rb")
+val = pickle.load(F)
 print(val)
 F.close()

1 File handle/File handle binary/Update a binary file2.py

@@ -1,30 +1,31 @@
-#updating records in a bnary file
+# updating records in a bnary file
 
 import pickle
 
+
 def update():
-    F=open("studrec.dat","rb+")
-    value=pickle.load(F)
-    found=0
-    roll=int(input("Enter the roll number of the record"))
+    F = open("studrec.dat", "rb+")
+    value = pickle.load(F)
+    found = 0
+    roll = int(input("Enter the roll number of the record"))
     for i in value:
-        if roll==i[0]:
+        if roll == i[0]:
             print("current name", i[1])
             print("current marks", i[2])
-            i[1]=input("Enter the new name")
-            i[2]=int(input("Enter the new marks"))
-            found=1
+            i[1] = input("Enter the new name")
+            i[2] = int(input("Enter the new marks"))
+            found = 1
 
-    if found==0:
+    if found == 0:
         print("Record not found")
 
     else:
-        pickle.dump(value,F)
+        pickle.dump(value, F)
         F.seek(0)
-        newval=pickle.load(F)
+        newval = pickle.load(F)
         print(newval)
-        
+
     F.close()
-update()
 
-    
+
+update()

1 File handle/File handle binary/question 1 (elegible for remedial, top marks).py

@@ -1,4 +1,4 @@
-'''Amit is a monitor of class XII-A and he stored the record of all
+"""Amit is a monitor of class XII-A and he stored the record of all
 the students of his class in a file named “class.dat”.
 Structure of record is [roll number, name, percentage]. His computer
 teacher has assigned the following duty to Amit
@@ -7,60 +7,71 @@
  remedial class (student who scored less than 40 percent)
 
  
- '''
-#also find no. of children who got top marks
+ """
+# also find no. of children who got top marks
 
 import pickle
-F=open("class.dat",'ab')
-list=[[1,"Ramya",30],[2,"vaishnavi",60],[3,"anuya",40],[4,"kamala",30],[5,"anuraag",10],[6,"Reshi",77],[7,"Biancaa.R",100],[8,"sandhya",65]]
 
+F = open("class.dat", "ab")
+list = [
+    [1, "Ramya", 30],
+    [2, "vaishnavi", 60],
+    [3, "anuya", 40],
+    [4, "kamala", 30],
+    [5, "anuraag", 10],
+    [6, "Reshi", 77],
+    [7, "Biancaa.R", 100],
+    [8, "sandhya", 65],
+]
 
-pickle.dump(list,F)
+
+pickle.dump(list, F)
 F.close()
 
+
 def remcount():
-    F=open("class.dat","rb")
-    val=pickle.load(F)
-    count=0
-    
+    F = open("class.dat", "rb")
+    val = pickle.load(F)
+    count = 0
+
     for i in val:
-        if i[2]<=40:
-            print(i,"eligible for remedial")
-            count+=1
-    print("the total number of students are",count)
+        if i[2] <= 40:
+            print(i, "eligible for remedial")
+            count += 1
+    print("the total number of students are", count)
     F.close()
 
+
 remcount()
 
+
 def firstmark():
-    F=open("class.dat",'rb')
-    val=pickle.load(F)
-    main=[]
-    count=0
-    
+    F = open("class.dat", "rb")
+    val = pickle.load(F)
+    main = []
+    count = 0
+
     for i in val:
-        data=i[2]
+        data = i[2]
         main.append(data)
-        
-    top=max(main)
-    print(top,"is the first mark")
+
+    top = max(main)
+    print(top, "is the first mark")
 
     F.seek(0)
     for i in val:
-        if top==i[2]:
+        if top == i[2]:
             print(i)
             print("congrats")
-            count+=1
-        
-    
-    print("the total number of students who secured top marks are",count)
+            count += 1
+
+    print("the total number of students who secured top marks are", count)
     F.close()
+
+
 firstmark()
 
-F=open("class.dat","rb")
-val=pickle.load(F)
+F = open("class.dat", "rb")
+val = pickle.load(F)
 print(val)
 F.close()
-
-
-  

1 File handle/File handle binary/search record in binary file.py

@@ -1,22 +1,24 @@
-#binary file to search a given record
+# binary file to search a given record
 
 import pickle
 
+
 def binary_search():
-    F=open("studrec.dat",'rb')  
+    F = open("studrec.dat", "rb")
     # your file path will be different
-    value=pickle.load(F)
-    search=0
-    rno=int(input("Enter the roll number of the student"))
+    value = pickle.load(F)
+    search = 0
+    rno = int(input("Enter the roll number of the student"))
 
     for i in value:
-        if i[0]== rno:
+        if i[0] == rno:
             print("Record found successfully")
             print(i)
-            search=1
+            search = 1
 
-    if search==0:
+    if search == 0:
         print("Sorry! record not found")
     F.close()
 
-binary_search()    
+
+binary_search()

1 File handle/File handle text/file handle 12 length of line in text file.py

@@ -1,10 +1,12 @@
 def longlines():
-    F=open("story.txt","r")
-    line=F.readlines()
+    F = open("story.txt", "r")
+    line = F.readlines()
 
     for i in line:
-        if len(i)<50:
-            print(i,end="   ")
-            
+        if len(i) < 50:
+            print(i, end="   ")
+
     F.close()
-longlines()     
+
+
+longlines()

1 File handle/File handle text/input,output and error streams.py

@@ -1,15 +1,20 @@
-#practicing with streams
+# practicing with streams
 import sys
+
 sys.stdout.write("Enter the name of the file")
-file=sys.stdin.readline()
+file = sys.stdin.readline()
+
+F = open(file.strip(), "r")
 
-F=open(file.strip(),"r")
-    
 while True:
-    ch=F.readlines()
-    for i in ch():        #ch is the whole file,for i in ch gives lines, for j in i gives letters,for j in i.split gives words
-        print(i,end="") 
+    ch = F.readlines()
+    for (
+        i
+    ) in (
+        ch()
+    ):  # ch is the whole file,for i in ch gives lines, for j in i gives letters,for j in i.split gives words
+        print(i, end="")
     else:
         sys.stderr.write("End of file reached")
         break
-F.close()        
+F.close()

1 File handle/File handle text/question 2.py

@@ -3,16 +3,16 @@
  using read function
 and display those words, which are less than 4 characters. """
 
-F=open("story.txt","r")
-value=F.read()
-lines=value.split()
-count=0
+F = open("story.txt", "r")
+value = F.read()
+lines = value.split()
+count = 0
 
 for i in lines:
-    if len(i)<4:
+    if len(i) < 4:
         print(i)
-        count+=1
+        count += 1
     else:
         pass
 
-print("The total number of words with length less than 4 are",count)
+print("The total number of words with length less than 4 are", count)