python RegEx.py

#A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern.
#RegEx can be used to check if a string contains the specified search pattern.

import re
txt = "The rain in Spain"
x = re.search("^The.*Spain$", txt)
if x:
    print("YES! We have a match!")
else:
    print("No match")
print(x)
print()


txt = "The rain in Spain"
#Find all lower case characters alphabetically between "a" and "m":
x = re.findall("[a-m]", txt)
print(x)
print()

txt = "That will be 59 dollars"
#Find all digit characters:
x = re.findall("\d", txt)
print(x)
print()

txt = "The rain in Spain falls mainly in the plain!"
#Check if the string contains "ai" followed by 1 or more "x" characters:
x = re.findall("aix+", txt)
print(x)
if x:
  print("Yes, there is at least one match!")
else:
  print("No match")
print()


txt = "The rain in Spain"
#Check if "ain" is present at the beginning of a WORD:
x = re.findall(r"\bain", txt)
print(x)
if x:
  print("Yes, there is at least one match!")
else:
  print("No match")
print()

xt = "The rain in Spain"
x = re.findall("ai", txt)
print(x)

txt = "The rain in Spain"
x = re.findall("Portugal", txt)
print(x)

txt = "The rain in Spain"
x = re.search("\s", txt)
print("The first white-space character is located in position:", x.start())

txt = "The rain in Spain"
x = re.split("\s", txt)
print(x)

txt = "The rain in Spain"
x = re.sub("\s", "9", txt)
print(x)

txt = "The rain in Spain"
x = re.sub("\s", "9", txt, 2)
print(x)

txt = "The rain in Spain"
x = re.search("ai", txt)
print(x) #this will print an objecttxt = "The rain in Spain"


txt = "The rain in Spain"
x = re.search(r"\bS\w+", txt)
print(x.span())


txt = "The rain in Spain"
x = re.search(r"\bS\w+", txt)
print(x.string)


txt = "The rain in Spain"
x = re.search(r"\bS\w+", txt)
print(x.group())