lists.py

colors = ['red','green','blue', 'yellow']

a_list = []    # κενή λίστα

whatever = ['abc', 4.56, [2,3], 'def', 6]
print(whatever)

print(colors[0])   # 'red'
print(colors[1])   # 'green'
print(colors[-1])  # 'yellow'

colors = ['red','green','blue', 'yellow']

print(colors[1:3])
# ['green', 'blue']
print(colors[1:])
# ['green', 'blue', 'yellow']
print(colors[::2])
# ['red', 'blue']
print(colors[::-1])
# ['yellow', 'blue', 'green', 'red']
print(len(colors))
# 4

print(colors + ['orange', 'purple'])
# ['red', 'green', 'blue', 'yellow', 'orange', 'purple']

print(2 * colors)
# ['red', 'green', 'blue', 'yellow', 'red', 'green', 'blue', 'yellow']

print('red' in colors)
# True
print('brown' in colors)
# False

print(colors)
# ['red', 'green', 'blue', 'yellow']

colors.append('brown')
print(colors)
# ['red', 'green', 'blue', 'yellow', 'brown']

colors.remove('brown')
print(colors)
# ['red', 'green', 'blue', 'yellow']

for color in colors:
    print(color, end=" ")
# red green blue yellow

for color in colors:
    print(color.upper(), end=" ")
# RED GREEN BLUE YELLOW 

colors.sort()
print(colors)
# ['blue', 'green', 'red', 'yellow']

colors.pop()
print(colors)
# ['blue', 'green', 'red']

[2, 3, 4, 5, 4].count(4)    # 2

colors = ['blue', 'green', 'red']
colors.insert(1, 'yellow')
print(colors)
# ['blue', 'yellow', 'green', 'red']

# μετατροπή συμβολοσειράς σε λίστα
word = 'Python'
list(word)
# ['P', 'y', 't', 'h', 'o', 'n']

# μετατροπή λίστας σε συμβολοσειρά
words = ['hello', 'word']
" ".join(words)
# 'hello world'

# tuples
a = (1 , 'asdf', 3.14)
print(a)

location = ('pos4work', 'patra', 'greece')
print(location[0])
location[0] = 'other'  # error - δεν αλλάζει τιμή

for part in location:
    print(part, end=' ')
# pos4work patra greece