Assuming that we have some email addresses in the "[email protected]" format, please write program to print the company name of a given email address. Both user names and company names are composed of letters only.
Example: If the following email address is given as input to the program:
Then, the output of the program should be:
google
In case of input data being supplied to the question, it should be assumed to be a console input.
Use \w to match letters.
Main author's Solution: Python 2
import re
emailAddress = raw_input()
pat2 = "(\w+)@(\w+)\.(com)"
r2 = re.match(pat2,emailAddress)
print r2.group(2)My Solution: Python 3
import re
email = "[email protected] [email protected]"
pattern = "\w+@(\w+).com"
ans = re.findall(pattern,email)
print(ans)Write a program which accepts a sequence of words separated by whitespace as input to print the words composed of digits only.
Example: If the following words is given as input to the program:
2 cats and 3 dogs.
Then, the output of the program should be:
['2', '3']
In case of input data being supplied to the question, it should be assumed to be a console input.
Use re.findall() to find all substring using regex.
Main author's Solution: Python 2
import re
s = raw_input()
print re.findall("\d+",s)My Solution: Python 3
import re
email = input()
pattern = "\d+"
ans = re.findall(pattern,email)
print(ans)OR
email = input().split()
ans = []
for word in email:
if word.isdigit(): # can also use isnumeric() / isdecimal() function instead
ans.append(word)
print(ans)OR
email = input().split()
ans = [word for word in email if word.isdigit()] # using list comprehension method
print(ans)Print a unicode string "hello world".
Use u'strings' format to define unicode string.
Main author's Solution: Python 2
unicodeString = u"hello world!"
print unicodeStringWrite a program to read an ASCII string and to convert it to a unicode string encoded by utf-8.
Use unicode()/encode() function to convert.
Main author's Solution: Python 2
s = raw_input()
u = unicode( s ,"utf-8")
print uMy Solution: Python 3
s = input()
u = s.encode('utf-8')
print(u)Write a special comment to indicate a Python source code file is in unicode.
Use unicode() function to convert.
Solution:
# -*- coding: utf-8 -*-Write a program to compute 1/2+2/3+3/4+...+n/n+1 with a given n input by console (n>0).
Example: If the following n is given as input to the program:
5
Then, the output of the program should be:
3.55
In case of input data being supplied to the question, it should be assumed to be a console input.
Use float() to convert an integer to a float.Even if not converted it wont cause a problem because python by default understands the data type of a value
Main author's Solution: Python 2
n=int(raw_input())
sum=0.0
for i in range(1,n+1):
sum += float(float(i)/(i+1))
print sumMy Solution: Python 3
n = int(input())
sum = 0
for i in range(1, n+1):
sum+= i/(i+1)
print(round(sum, 2)) # rounded to 2 decimal point'''Solution by: lcastrooliveira
'''
def question_59(n):
print(round(sum(map(lambda x: x/(x+1), range(1, n+1))), 2))
question_59(5)