def main():
capacity = int( input( "Enter capacity (-1 for default): " ) )
if capacity < 0:
hTable = HashTable()
else:
hTable = HashTable( capacity )
filename = input( "Enter filename: " )
wordTable = word_count( hTable, filename )
printSummary( wordTable )
while True:
print( "Commands: k[ey] <word> f[ind] <word> q[uit] ? ", end=" " )
response = input( ":- " ) # the displayed prompt
query = response.split()
if len( response ) == 0 or not response[0] in "fkq":
print( response + " invalid. Please enter a command and a word." )
response = ""
continue
if query[0] == "k":
print( "( " + query[1] + " in text ) is " \
+ str( contains( wordTable, query[1] ) ) + "." )
if query[0] == "f":
if contains( wordTable, query[1] ):
print( query[1] + " appears " \
+ str( get( wordTable, query[1] ) ) + " times." )
else:
print( query[1] + " in not in the text." )
if query[0] == "q":
break
#
answer = input( "Do you want to see the entire table?(y/n) " )
if answer != "y":
return
printTable( wordTable )
def word_count( hTable, filename ):
"""
Record the frequency of all words in the named file in the hashtable.
word_count : HashTable String -> HashTable
"""
# Read the words of the text file into the word count table.
fd = open( filename )
for line in fd:
for word in line.split():
# using a regular expression argument to strip(),
# strip out punctuation and convert token to lower-case.
word = word.strip(",.\"\';:-!?").lower()
if contains( hTable, word ):
count = get( hTable, word )
put( hTable, word, count + 1 )
else:
put( hTable, word, 1 )
fd.close() # closing the file is a 'good practice'.
return hTable