automatetheboring shit: chapter 8, madlibs

madlibs.py

# Create a Mad Libs program that reads in text files and lets the user add
# their own text anywhere the word ADJECTIVE, NOUN, ADVERB, or VERB
# appears in # the text file. For example, a text file may look like this:

# The ADJECTIVE panda walked to the NOUN and then VERB. A nearby NOUN was
# unaffected by these events.

# The program would find these occurrences and prompt the user to replace them.

# Enter an adjective:
# silly
# Enter a noun:
# chandelier
# Enter a verb:
# screamed
# Enter a noun:
# pickup truck

# The following text file would then be created:

# The silly panda walked to the chandelier and then screamed. A nearby pickup
# truck was unaffected by these events.
import sys
import re


def markerrepl(matchobj):
    marker = matchobj.group(0).lower()
    return input(f"Enter a(n) {marker}: ")


sentence = open(sys.argv[1]).read()
new_sentence = re.sub("(ADJECTIVE|NOUN|(AD)?VERB)", markerrepl, sentence)
print(new_sentence)