''' Purpose: continue string manipulation introduction
'''

print()

# strings can produced strip versions of themselves -- a
# version without LEADING or TRAILING whitespace.  Internal
# whitespace is uneffected.  The ability comes from the string
# member method strip()
# ------------

q = "   Look there is a   Blibbering Humdinger  "

print( "q = '" + q + "'"  )

print(); input( "Enter when ready: " ); print()

print( "### mis-attempted stripping" )

q.strip()                   # q is uneffected. strip() produces
                            # a new string

# .strip() hands back a new string with
# leading and trailing whitespace removed!
# If you just do q.strip() alone in the code without
# storing it in a variable .. that does NOTHING.
# You need to store it in a new variable (or in the
# original variable although we prefer you don't) so that the new
# variable contains the updated string with the function applied to it.

x = "314"
int(x) # so int(x) is just called in the code but is it stored anywhere?
# We did not change x! The function is called but it's value 314 isn't stored
# anywhere so we have to do an assignment and store it somewhere.

# x = "314"
# x_int = int(x) now x_int holds 314


print( "q = '" + q + "'"  )

print(); input( "Enter when ready: " ); print()

print( "### stripping" )

s = q.strip()               # q is still uneffected, but s is a
                            # stripped version of s

print( "q = '" + q + "'"  )
print( "s = '" + s + "'" )

print(); input( "Enter when ready: " ); print()

# strings can produce their component words.  The ability comes
# from the string member method split()
#                 -------------

print( "### splitting" )

f = "bananas  $0.69"
c = "SEAS CS 1112"

print( "f = '" + f + "'" )
print( "c = '" + c + "'" )

print(); input( "Enter when ready: " ); print()

fruit, price = f.split()              # splits fruit into list of individual
                                      # words, which for this example is a
                                      # fruit and its cost

school, subject, number = c.split()   # splits person into list of indiviudal
                                      # words, which for this example is a
                                      # name, home planet, and age

print( fruit, "costs", price, "per pound" )
print( "School:", school, "  subject:", subject,
            "  number:", number )

### pause to think what has happened

print(); input( "Enter when ready: " ); print()

print( "### list making" )

s1 = f.split()              # s1 is a 2-element list
s2 = c.split()              # s2 is a 3-element list

print( "s1 = ", s1 )
print( "s2 = ", s2 )