# Start writing code here...
Controls and Functions
less = []
greater = []
for x in [1,3,4,2,8,6]:
if x < 3 :
less.append(x)
else:
greater.append(x)
print("less = ", less, "greater = ", greater )
a = [1,2,3]
a
b =a
b
a.append(4)
b
Conditionals
if, elif, else
x = -5
if x < 0:
print("Its's negative")
x
y
print(y)
print(x)
if int(x) < 0:
print("It's negative")
elif int(x) == 0:
print("Equal to zero")
elif 0 < int(x) < 5:
print("Positive but smaller than 5")
else:
print("Postitive and larger than or equal to zero")
Loops
sequence = [1,2,0,4,6,5,2,1]
total = 0
for value in sequence:
total += value # total = total + value
print("total =", total)
seqeunce = [1, 2, None, 4, None, 5]
total = 0
for value in sequence:
if value is None:
continue
total += value
print(total)
sequence = [1,2,0,4,6,5,2,1]
total_until_5 = 0
for value in seqeunce:
if value == 5:
break
total_until_5 == value
print(total_until_5)
While Loop
x = 256
total = 0
while x > 0:
print(x)
if total > 500:
break
total += x
print(total)
x //= 2
Built in Sequences
Enumerate
# enumerate function
l1 = {"eat", "sleep", "repeat"}
# of creating enumerate objects
obj1 = enumerate(l1)
print ("Return type:", type(obj1))
print (list(enumerate(l1)))
Sorted
a = [7,1,2,6,0,3,2]
sorted(a)
a
print(sorted("COP2000 Python Programming"))
Zip
seq1 = ["Un", "Dos", "Tres"]
seq2 = ["one", "two", "three"]
zipped = zip(seq1, seq2)
list(zipped)
seq3 = [False, True]
list(zip(seq1, seq2,seq3))
for index, (a, b)in enumerate(zip(seq1, seq2)):
print(f"{index}: {a},{b}") # https://realpython.com/python-f-strings/
Reversed
list(reversed(range(10)))
Lambda Function
def apply_to_list(some_list, f):
return [f(x) for x in some_list]
ints = [2,4,6,8,1,3,5]
apply_to_list(ints, lambda x: x ** 2) x^2
Files and OS
! wget "https://www.gutenberg.org/files/76/76-0.txt" -0 adventures.txt
! ( head -10 adventures.txt) > adventures10.txt
f = open("adventures10.txt", encoding="utf-8")
for line in f:
print(line)