python codes for file handling and college projects..

 # fname = input("Enter file name: ")

# fh = open(fname)
# lst=[]
#
# for line in fh:
#     if not line.startswith("X-DSPAM-Confidence:") : continue
#     b=line
#     #print(b)
#     x=b.find('0')
#     host=b[x:]
#     #print(host)
#     flt=float(host)
#     #print(flt)
#     lst.append(flt)
#     #print(lst)
#
# total=0
# count=0
# for i in lst:
#     total=i+total
#     count=count+1
# #print(count)
# print("Average spam confidence:",total/count)





# fname = input("Enter file name: ")
# fopen = open(fname)
# count = 0
# average = 0
# for line in fopen:
#     if not line.startswith("X-DSPAM-Confidence:") :continue
#     average += float(line[20:-1].strip())
#     count = count + 1
#     #print(line)
#
# print("Average spam confidence:", (average/count))
#





# name = input("Enter file:")
# fopen = open(name)
# if len(name) < 1 :
#     name = "mail.txt"
#
# d=dict()
# for line in fopen:
#     if not line.startswith("From "):
#         continue
#     else:
#         line=line.split()
#         line=line[5]
#         line=line[0:2]
#         d[line]=d.get(line,0)+1
#
# lst=list()
# for value,count in d.items():
#     lst.append((value,count))
#
# lst.sort()
# for value,count in lst:
#     print (value,count)



# name = input("Enter file name:")
# if len(name) < 1:
#          name = "mail.txt"
# fopen = open(name)
# l=list()
# count=dict()
# for line in fopen :
#     if line.startswith("From "):
#         line=line.strip().split()
#         hours=line[5]
#         hours=hours[:2]
#         l.append(hours)
#
# for hour in l :
#     count[hour]=count.get(hour,0)+1
#
# for k,v in sorted(count.items()) :
#     print(k,v)

fname = input("Enter file:")
if len(fname) < 1 : name = "mail.txt"
hand = open(fname)

lst = list()

for line in hand:
    if not line.startswith("From:"): continue
    line = line.split()
    lst.append(line[1])

counts = dict()
for word in lst:
    counts[word] = counts.get(word,0) + 1

bigcount = None
bigword = None
for word,count in counts.items():
    if bigcount is None or count > bigcount:
        bigcount = count
        bigword = word

print (bigword,bigcount)




# import re
# file = input('enter the file name') #assumed input file
# fopen=open(file)
# for line in fopen:
#  x=re.search('^From.*[0-9][0-9]:.x', line) #applied regular expression
# if len(x) > 0:
#     print(x)




# Exercise 2: Write a program to look for lines of the form

# New Revision: 39772

#and extract the number from each of the lines using a regular
# expression and the findall() method. Compute the average of the numbers and print out
# the average.

# Enter file:mbox.txt 38549.7949721

# Enter file:mbox-short.txt 39756.9259259

# import re
# count = 0
# revisions = 0
# #Opening the file so that we can search through it
# file = input('enter the file name')
#
# fopen=open(file)
# for line in fopen:
#     line = line.rstrip()
#     if re.findall('New Revision:', line):
#       revison = line[14:19]
#       count += 1
#       #We'll count each instance and add each new found one to the next to make the sum
#       revisions = revisions + float(revison)
#
# average = revisions/count
# print("the average of the  numbers in the file mail.txt is " + str(average))




# hour = input("Enter Hours:")
# ihour = float(hour)
# rate = input("Enter the Rate:")
# irate = float(rate)
# if ihour <= 40:
#      print( ihour  * irate)
# elif ihour > 40:
#  print(40* irate + (ihour-40)*1.5*irate)



# first  create a list

#
# # # Program without using any external library
# s = open('mail.txt').read()
# l = s.split()
# k = []
# for i in l:
#
#  # If condition is used to store unique string
#  # in another list 'k'
#  if (s.count(i)>1 and (i not in k)or s.count(i)==1):
#     k.append(i)
# print(' '.join(k))
# print(len(k))


# from collections import Counter
# p=[]
# def remov_duplicates(input):
#
#  # split input string separated by space
#  input = input.split(" ")
#
#  # joins two adjacent elements in iterable way
#  for i in range(0, len(input)):
#     input[i] = "".join(input[i])
#
#  # now create dictionary using counter method
#  # which will have strings as key and their
#  # frequencies as value
#  UniqW = Counter(input)
#
#  # joins two adjacent elements in iterable way
#  s = " ".join(UniqW.keys())
#  print (s)
#
# # Driver program
# if __name__ == "__main__":
#  input = open('mail.txt').read()
#  remov_duplicates(input)




#6
# number = input("Enter the number ")
# s =  float(number)
# x = 0
#
# if s >= 0.9:
#  x = 'A'
# elif s >=0.8:
#  x='B'
# elif s >=0.7:
#  x='C'
# elif s >= 0.6:
#  x='D'
# elif s < .6:
#  x ='F'
# else:
#  x ="Out of Range"
# print (x)

# s = open('mail.txt').read()
# l = s.split()
# k = list()
# p=[]
# for i in l:
#
#  # If condition is used to store unique string
#  # in another list 'k'
#  if (s.count(i)>1 and (i not in k)or s.count(i)==l):
#          k.append(i)
# print(' '.join(k))
# print(len(l))
# print(len(k))