[what] More Program Control Structures In Python

• IF
• IF ELIF
• IF ELIF ELSE
• WHILE
• BREAK
• CONTINUE
• ELSE
• FOR
• FOR ... IN
• FOR ... IN RANGE
• ELSE

Most of the examples below used Lambda to iterate through Iterable Object values and process them. Some results are then passed into Map, Filter, and Reduce functions. Further reading: (1) Lambda, (2) Iterable Objects, (3) Map, Filter, and Reduce functions.

...

print ("\n====================\n")
print ("This program displays list in vertical order.")
def printListVertically(list):
  for item in list:
    print (item)

print ("\n====================\n")

text='''called cust care but no response
so far so good :-)
very low power processor
there is no option to activate in the website
no problem at all
i don't know why it is so complicated :(
don't know how to contact them now  :(
customer service is also good
i don't think they allow it these days :-(
didn't know that you can do it
that's really good to know
very happy now :)
so happy with the services
but I found that the rates were very low'''

listSentence=text.split("\n")
print ("Sample sentences:")
printListVertically(listSentence)

print ("\n====================\n")
dictEmoticon={":-)":"pos",":)":"pos",":-(":"neg",":(":"neg"}
print ("Emoticons and their polarities:")
# use zip function to convert dictionary to list object
listEmoticon=list(zip(dictEmoticon.keys(), dictEmoticon.values()))
printListVertically(listEmoticon)

print ("\n====================\n")
# use lambda to iterate through object item, filter their values and convert to dict
dictPositiveEmoticon  = dict(filter(lambda x:x[1] in ['pos'],listEmoticon))
print ("Positive Emoticons:")
printListVertically(dictPositiveEmoticon)
# alternative:
# dictfilt =lambda x,y: dict([ (i,x[i]) for i in x if x[i]=='pos' ])
# dictPositiveEmoticon= dictfilt(dictEmoticon,"pos")
# print(dictPositiveEmoticon)


print ("\n====================\n")
# (1) IF
def findEmoticon(sentence):
  found=False
  # for each emoticon in dictionary, find them in sentence
  for emoticon in set(dictEmoticon.keys()):
    if (emoticon in sentence):
      found=True
  return found  
# use lambda to iterate through object item and then filter their values  
listEmoticonFound= filter(lambda element:findEmoticon(element)==True,listSentence)
print ("Sentences containing emoticons:")
printListVertically(listEmoticonFound)

print ("\n====================\n")
# (2) IF ELIF
def findHappyToken(sentence):
  found=False
  # tokenize sentence
  listWord=sentence.split()
  #print(listWord)
  # if there is any token in listWord matches with token in positive emoticon dictionary
  if (any(substring in listWord for substring in dictPositiveEmoticon)):
    found=True
  #if there is any token in listWord matches with token in happy list
  elif (any(substring in listWord for substring in ['happy'])):
    found=True
  return found  

# use lambda to iterate object item and then filter their values  
listHappyTokenFound= filter(lambda element:findHappyToken(element)==True,listSentence)
print ("Sentences containing happy tokens:")
printListVertically(listHappyTokenFound)

print ("\n====================\n")
# (3) IF ELIF ELSE
def findHappySentence(sentence):
  emotion=''
  # tokenize sentence
  listWord=sentence.split()
  # if there is any token in listWord matches with token in positive emoticon dictionary
  if (any(substring in listWord for substring in dictPositiveEmoticon)):
    emotion='happy'
  #if there is any token in listWord matches with token in happy list
  elif (any(substring in listWord for substring in ['happy'])):
    emotion='happy'
  else:
    emotion='unknown'
  return "["+emotion+"]"+sentence 
# use lambda to iterate through object item and then map their values  
listHappySentence=map( lambda element:findHappySentence(element),listSentence)
print ("Sentences and their happy emotions:")
printListVertically(sorted(listHappySentence))

print ("\n====================\n")

~

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