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icncsx
icncsx

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Functions are first class objects

#python #todayilearned #computerscience

By functions being first-class objects, we mean that we can:

  • assign functions to variables
  • store functions in data structures
  • pass functions as arguments to other functions
  • return functions as values from other functions.

Assignment 

def yell(text): return text.upper() + '!' bark = yell bark('woof')
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Functions can be stored in data structures 

funcs = [str.lower, str.capitalize] for f in funcs: print(f('hey there'))
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Functions can be passed to other functions 

def yell(text): return text.upper() + '!' map(yell, ['hello', 'hey', 'hi'])
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Functions can be returned from other functions 

def talk(volume): def whisper(text): return text.lower() + '...' def yell(text): return text.upper() + '!' if volume > 0.5: return yell else: return whisper talk(0.8)("hello")
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