# the print() function is a function that just does something and moves on - but it
# hands back nothing (returns nothing to the user), therefore it hands back None.
# print_return is assigned the value of the print function call
# print_return = None
# So when we print( print_return ), we print the value of print_return which is the
# value of the function call which is None

print_return = print( 'Clara' ) # It does print Clara (what the function print does)
# but the function call hands back None so None is stored in print_return
print( print_return )

x = []
x = x.append( 1 ) # Don't do this!
print( x )

y = []
y.append( 1 )
print( y )

# Again, append() hands back None
# The point of append() is just to add the thing in parentheses to the list but it
# hands back None (just adds it and moves on)
# So when we do x = x.append( 1 )
# We're doing   x = None
# Therefore, x is None.
# So just call x.append(1) not x = x.append(1)
# Don't assign append() to a variable! (Refer to accumulator review for examples!)

# Just call listvariable.append( x ) for the listvariable
# and don't set it equal to a variable :) That's all for now.
# Don't do listvariable = listvariable.append( x )

# Strings are IMMUTABLE - cannot be changed
s = 'Apple'
s.lower() # The original string s is unchanged
print( s ) # 'Apple'
t = s.lower()
print( t ) # 'apple'

# Lists ARE mutable - can be changed!
list1 = []
list1.append( 'addme' )
print( list1 ) # ['addme']

s = 'apple banana cherry orange'
fruits = s.split # No parentheses?? No longer calling the function on s and getting the value from s.split()
print( fruits ) # fruits is now the function split being called on s but not the VALUE of s.split()

# fruits is now an alias for s.split (but not the function call s.split())
# Remember parentheses on functions! Do s.split() not s.split