Refactored and Optimised Code base

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

@@ -10,11 +10,7 @@ def bdelete():
     # Deleting the Roll no. entered by user
     rno = int(input("Enter the Roll no. to be deleted: "))
     with open("studrec.dat") as F:
-        rec = []
-        for i in stud:
-            if i[0] == rno:
-                continue
-            rec.append(i)
+        rec = [i for i in stud if i[0] != rno]
         pickle.dump(rec, F)
 
 

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

@@ -4,30 +4,27 @@
 
 
 def 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
-            break
+    with open("class.dat", "rb+") as F:
+        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
+                break
 
-    if found == 0:
-        print("Record not found")
+        if found == 0:
+            print("Record not found")
 
-    else:
-        F.seek(0)
-        pickle.dump(S, F)
-
-    F.close()
+        else:
+            F.seek(0)
+            pickle.dump(S, F)
 
 
 update()
 
-F = open("class.dat", "rb")
-val = pickle.load(F)
-print(val)
-F.close()
+with open("class.dat", "rb") as F:
+    val = pickle.load(F)
+    print(val)

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

@@ -4,28 +4,26 @@
 
 
 def update():
-    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]:
-            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
-
-    if found == 0:
-        print("Record not found")
-
-    else:
-        pickle.dump(value, F)
-        F.seek(0)
-        newval = pickle.load(F)
-        print(newval)
-
-    F.close()
+    with open("studrec.dat", "rb+") as F:
+        value = pickle.load(F)
+        found = 0
+        roll = int(input("Enter the roll number of the record"))
+        for i in value:
+            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
+
+        if found == 0:
+            print("Record not found")
+
+        else:
+            pickle.dump(value, F)
+            F.seek(0)
+            newval = pickle.load(F)
+            print(newval)
 
 
 update()

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

@@ -8,70 +8,67 @@
 
 
  """
+
 # 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],
-]
+with open("class.dat", "ab") as F:
+    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)
-F.close()
+    pickle.dump(list, F)
 
 
 def remcount():
-    F = open("class.dat", "rb")
-    val = pickle.load(F)
-    count = 0
+    with open("class.dat", "rb") as F:
+        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)
-    F.close()
+        for i in val:
+            if i[2] <= 40:
+                print(i, "eligible for remedial")
+                count += 1
+        print("the total number of students are", count)
 
 
 remcount()
 
 
 def firstmark():
-    F = open("class.dat", "rb")
-    val = pickle.load(F)
-    main = []
-    count = 0
+    with open("class.dat", "rb") as F:
+        val = pickle.load(F)
+        main = []
+        count = 0
 
-    for i in val:
-        data = i[2]
-        main.append(data)
+        for i in val:
+            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]:
-            print(i)
-            print("congrats")
-            count += 1
+        F.seek(0)
+        for i in val:
+            if top == i[2]:
+                print(i)
+                print("congrats")
+                count += 1
 
-    print("the total number of students who secured top marks are", count)
-    F.close()
+        print("the total number of students who secured top marks are", count)
 
 
 firstmark()
 
-F = open("class.dat", "rb")
-val = pickle.load(F)
-print(val)
-F.close()
+with open("class.dat", "rb") as F:
+    val = pickle.load(F)
+    print(val)

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

@@ -4,21 +4,20 @@
 
 
 def binary_search():
-    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"))
+    with open("studrec.dat", "rb") as F:
+        # your file path will be different
+        value = pickle.load(F)
+        search = 0
+        rno = int(input("Enter the roll number of the student"))
 
-    for i in value:
-        if i[0] == rno:
-            print("Record found successfully")
-            print(i)
-            search = 1
+        for i in value:
+            if i[0] == rno:
+                print("Record found successfully")
+                print(i)
+                search = 1
 
-    if search == 0:
-        print("Sorry! record not found")
-    F.close()
+        if search == 0:
+            print("Sorry! record not found")
 
 
 binary_search()

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

@@ -8,9 +8,8 @@
 
     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
+        for i in ch:
             print(i, end="")
-        else:
-            sys.stderr.write("End of file reached")
-            break
+        sys.stderr.write("End of file reached")
+        break
 

1 File handle/File handle text/special symbol after word.py

@@ -1,16 +1,15 @@
-F = open("happy.txt", "r")
-# method 1
-val = F.read()
-val = val.split()
-for i in val:
-    print(i, "*", end="")
-print("\n")
+with open("happy.txt", "r") as F:
+    # method 1
+    val = F.read()
+    val = val.split()
+    for i in val:
+        print(i, "*", end="")
+    print("\n")
 
 
-# method 2
-F.seek(0)
-value = F.readlines()
-for line in value:
-    for word in line.split():
-        print(word, "*", end="")
-F.close()
+    # method 2
+    F.seek(0)
+    value = F.readlines()
+    for line in value:
+        for word in line.split():
+            print(word, "*", end="")

A solution to project euler problem 3.py

@@ -36,7 +36,7 @@ def solution(n: int = 600851475143) -> int:
     TypeError: Parameter n must be int or passive of cast to int.
     """
     try:
-        n = int(n)
+        n = n
     except (TypeError, ValueError):
         raise TypeError("Parameter n must be int or passive of cast to int.")
     if n <= 0:
@@ -55,7 +55,7 @@ def solution(n: int = 600851475143) -> int:
         ans = i
 
         while n % i == 0:
-            n = n / i
+            n /= i
 
         i += 1
 

AreaOfTriangle.py

@@ -14,4 +14,4 @@
 
 # calculate the area
 area = (s*(s-a)*(s-b)*(s-c)) ** 0.5
-print('The area of the triangle is: ' + area)
+print(f'The area of the triangle is: {area}')

Assembler/assembler.py

@@ -53,10 +53,9 @@ def loadFile(fileName):
     loadFile: This function loads the file and reads its lines.
     """
     global lines
-    fo = open(fileName)
-    for line in fo:
-        lines.append(line)
-    fo.close()
+    with open(fileName) as fo:
+        for line in fo:
+            lines.append(line)
 
 
 def scanner(string):

Automated Scheduled Call Reminders/caller.py

@@ -42,7 +42,7 @@ def search():
         timestamp = datetime.now().strftime("%H:%M")
         five_minutes_prior = (timestamp + timedelta(minutes=5)).strftime("%H:%M")
         for doc in list_of_docs:
-            if doc["from"][0:5] == five_minutes_prior:
+            if doc["from"][:5] == five_minutes_prior:
                 phone_number = doc["phone"]
                 call = client.calls.create(
                     to=phone_number,

Base Converter Number system.py

@@ -1,36 +1,29 @@
 def base_check(xnumber, xbase):
-    for char in xnumber[len(xnumber ) -1]:
-        if int(char) >= int(xbase):
-            return False
-    return True
+    return all(int(char) < int(xbase) for char in xnumber[len(xnumber ) -1])
 
 def convert_from_10(xnumber, xbase, arr, ybase):
-    if int(xbase) == 2 or int(xbase) == 4 or int(xbase) == 6 or int(xbase) == 8:
+    if int(xbase) in {2, 4, 6, 8}:
 
         if xnumber == 0:
             return arr
-        else:
-            quotient = int(xnumber) // int(xbase)
-            remainder = int(xnumber) % int(xbase)
-            arr.append(remainder)
-            dividend = quotient
-            convert_from_10(dividend, xbase, arr, base)
+        quotient, remainder = divmod(int(xnumber), int(xbase))
+        arr.append(remainder)
+        dividend = quotient
+        convert_from_10(dividend, xbase, arr, base)
     elif int(xbase) == 16:
         if int(xnumber) == 0:
             return arr
-        else:
-            quotient = int(xnumber) // int(xbase)
-            remainder = int(xnumber) % int(xbase)
-            if remainder > 9:
-                if remainder == 10: remainder = 'A'
-                if remainder == 11: remainder = 'B'
-                if remainder == 12: remainder = 'C'
-                if remainder == 13: remainder = 'D'
-                if remainder == 14: remainder = 'E'
-                if remainder == 15: remainder = 'F'
-            arr.append(remainder)
-            dividend = quotient
-            convert_from_10(dividend, xbase, arr, ybase)
+        quotient, remainder = divmod(int(xnumber), int(xbase))
+        if remainder > 9:
+            if remainder == 10: remainder = 'A'
+            if remainder == 11: remainder = 'B'
+            if remainder == 12: remainder = 'C'
+            if remainder == 13: remainder = 'D'
+            if remainder == 14: remainder = 'E'
+            if remainder == 15: remainder = 'F'
+        arr.append(remainder)
+        dividend = quotient
+        convert_from_10(dividend, xbase, arr, ybase)
 def convert_to_10(xnumber, xbase, arr, ybase):
     if int(xbase) == 10:
         for char in xnumber: