Homework Answers
Form the description it is clearly stated that KEYWORD is a Marco for list of keywords.
Based on the regular expression
<YYINITIAL> { KEYWORD} {keyword++;}
the value for keyword is the list of keywords defined by the macro KEYWORD.
<YYINITIAL> [a-zA-Z] [a-zA-Z0-9] * {id++;}
Thus the value of id can start with only alphabets and can contain a combination of alphabets and numbers.
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**TStack.py below** # CMPT 145: Linear ADTs # Defines the Stack ADT # # A stack (also called a pushdown or LIFO stack)...
**TStack.py below**
# CMPT 145: Linear ADTs
# Defines the Stack ADT
#
# A stack (also called a pushdown or LIFO stack) is a compound
# data structure in which the data values are ordered according
# to the LIFO (last-in first-out) protocol.
#
# Implementation:
# This implementation was designed to point out when ADT operations are
# used incorrectly.
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"""
Purpose
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Return
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"""
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**TStack.py below**
# CMPT 145: Linear ADTs
# Defines the Stack ADT
#
# A stack (also called a pushdown or LIFO stack) is a compound
# data structure in which the data values are ordered according
# to the LIFO (last-in first-out) protocol.
#
# Implementation:
# This implementation was designed to point out when ADT operations are
# used incorrectly.
def create():
"""
Purpose
creates an empty stack
Return
an empty stack
"""
return '__Stack__',list()
def is_empty(stack):
"""...
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