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Building Lists with List of Comprehension

## Instead of building a list with a loop:

b = [] 
for x in a: 
    b.append(10 * x) 
foo(b) 

## you can often build it much more concisely
 ## with a list comprehension:

foo([10 * x for x in a]) 

##or, if foo accepts an arbitrarily iterable (which it usually will), ## a generator expression:

foo(10 * x for x in a)

#html #lists

unordered list

<ul>

<li></li>

<li></li>

<li></li>

<li></li>

</ul>

#html #lists

Ordered list

<ol>

<li></li>

<li></li>

<li></li>

<li></li>

</ol>

#python #python #lists #dictionary

Convert two lists into a dictionary

keys, values)) # {'a': 2, 'c': 4, 'b': 3}
 
 
#make a function: def is the keyword for the function:
def to_dictionary(keys, values):
 
 
#return is the keyword that tells program that function has to return value   
return dict(zip(keys, values))
 
  
 
# keys and values are the lists:
 
keys = ["a", "b", "c"]   
 
values = [2, 3, 4]

#python #python #lists #clear #remove

How to remove all elements from the list

# a characters list
          1.characters = ['a', 'b', 'c', 'd', 'e', 'f']
          2.characters.clear()

#python #python #lists #add

How to add another item at the end of the list

# animals list
1.animals = ['cat', 'dog', 'rabbit']

# list of wild animals
2.wild_animals = ['tiger', 'fox']

# appending wild_animals list to the animals list
3.animals.append(wild_animals)

4.print('Updated animals list: ', animals)

#python #python #lists

How to create list in python

 Lucky_numbers = [“3”, “7”, “15”, “32”, “42”]

#python #python #remove #lists

Remove one element form the list

# animals list
1.animals = ['cat', 'dog', 'rabbit', 'guinea pig']

# 'rabbit' is removed
2.animals.remove('rabbit')

# Updated animals List
3.print('Updated animals list: ', animals)

#css #changingdefault #lists

Remove numbers from ordered list <ol>

ol li {
	 list-style-type: none;
     }
     
// OR

li {
	list-style-type: none;
}

#python #lists #function

Build a list using an iterator Python unfold function

def unfold(fn, seed):
  def fn_generator(val):
    while True: 
      val = fn(val[1])
      if val == False: break
      yield val[0]
  return [i for i in fn_generator([None, seed])]
  
  
EXAMPLES
f = lambda n: False if n > 50 else [-n, n + 10]
unfold(f, 10) # [-10, -20, -30, -40, -50]

Lists - HTML

Building Lists with List of Comprehension

unordered list

Ordered list

Convert two lists into a dictionary

How to remove all elements from the list

How to add another item at the end of the list

How to create list in python

Remove one element form the list

Remove numbers from ordered list <ol>

Build a list using an iterator Python unfold function

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