Python

math.acos() Returns the arc cosine of a number math.acosh() Returns the inverse hyperbolic cosine of a number math.asin() Returns the arc sine of a number math.asinh() Returns the inverse hyperbolic sine of a number math.atan() Returns the arc tangent of a number in radians math.atan2() Returns the arc tangent of y/x in radians math.atanh() Returns the inverse hyperbolic tangent of a number math.ceil() Rounds a number up to the nearest integer math.comb() Returns the number of ways to choose k items from n items without repetition and order math.copysign() Returns a float consisting of the value of the first parameter and the sign of the second parameter math.cos() Returns the cosine of a number math.cosh() Returns the hyperbolic cosine of a number math.degrees() Converts an angle from radians to degrees math.dist() Returns the Euclidean distance between two points (p and q), where p and q are the coordinates of that point math.erf() Returns the error function of a number math.erfc() Returns the complementary error function of a number math.exp() Returns E raised to the power of x math.expm1() Returns Ex - 1 math.fabs() Returns the absolute value of a number math.factorial() Returns the factorial of a number math.floor() Rounds a number down to the nearest integer math.fmod() Returns the remainder of x/y math.frexp() Returns the mantissa and the exponent, of a specified number math.fsum() Returns the sum of all items in any iterable (tuples, arrays, lists, etc.) math.gamma() Returns the gamma function at x math.gcd() Returns the greatest common divisor of two integers math.hypot() Returns the Euclidean norm math.isclose() Checks whether two values are close to each other, or not math.isfinite() Checks whether a number is finite or not math.isinf() Checks whether a number is infinite or not math.isnan() Checks whether a value is NaN (not a number) or not math.isqrt() Rounds a square root number downwards to the nearest integer math.ldexp() Returns the inverse of math.frexp() which is x * (2**i) of the given numbers x and i math.lgamma() Returns the log gamma value of x math.log() Returns the natural logarithm of a number, or the logarithm of number to base math.log10() Returns the base-10 logarithm of x math.log1p() Returns the natural logarithm of 1+x math.log2() Returns the base-2 logarithm of x math.perm() Returns the number of ways to choose k items from n items with order and without repetition math.pow() Returns the value of x to the power of y math.prod() Returns the product of all the elements in an iterable math.radians() Converts a degree value into radians math.remainder() Returns the closest value that can make numerator completely divisible by the denominator math.sin() Returns the sine of a number math.sinh() Returns the hyperbolic sine of a number math.sqrt() Returns the square root of a number math.tan() Returns the tangent of a number math.tanh() Returns the hyperbolic tangent of a number math.trunc() Returns the truncated integer parts of a number

Arithmetic: operator | name | example | + Addition x + y - Subtraction x - y * Multiplication x * y / Division x / y % Modulus x % y ** Exponentiation x ** y // Floor division x // y Comparison: Operator | Name | Example | == Equal x == y != Not equal x != y > Greater than x > y < Less than x < y >= Greater than or equal to x >= y <= Less than or equal to x <= y Assignment: Operator | Example | = x = 5 += x += 3 -= x -= 3 *= x *= 3 /= x /= 3 %= x %= 3 //= x //= 3 **= x **= 3 &= x &= 3 |= x |= 3 ^= x ^= 3 >>= x >>= 3 <<= x <<= 3

txt = "this is a wild string"

print(txt.replace("i", "x"))  # print string with all i characters replaced with x
print(txt.replace("i", "x", 2))  # print string with first two i characters found with x
print(txt.upper())  # print string in all uppercase letters
print(txt.lower())  # print string in all uppercase letters

print(ord('A'))  # print the ordinal value of a character
print(chr(95))  # print character from its ordinal value
print('Yes' * 5) # print string Yes 5 times

# Reference strings by index
print(txt[0])  # print first letter of string from starting index
print(txt[0:2])  # print first two letters from starting index
print(txt[1:])  # print all characters except the first letter
print(txt[0::2])  # print every second character
print(txt[::-1])  # print string in reverse
print(txt[-1])  # print the last character in a string
print(txt[-2:])  # print the last who characters in a string

# check if a wild is found in txt
if "wild" in txt:
  print("wild is found in txt")

# check if a blah is not found in txt
if "blah" not in txt:
  print("is not found in txt")

# Check if txt starts with this
if txt.startswith("this"):
  print("Starts with this")

# check if txt ends with ing
if txt.endswith("ing"):
  print("Ends with ing")

# Split a string into a tuple when the delimiter is first encountered
txt = 'random-data'

data_split = txt.partition('-')
print(data_split)
# output ('random', '-', 'data')

len(txt)  # Return length of string

# loop through each character in string
for char in txt:
  print(char)

# Display price with commas and 2 digit precision
price = 9749000
display_price = f"My price {price:,.2f}"
print(display_price)


fruits = ['orange', 'apple', 'pear', 'banana', 'kiwi', 'apple', 'banana']
fruits.count('apple')  # count number of apples found in list
# output 2
fruits.count('tangerine')  # count number of tangerines in list
# output 0
fruits.index('banana')  # find the first index of banana
# output 3
fruits.index('banana', 4)  # Find next banana starting a position 4
# output 6
fruits.reverse()  # reverse fruits array
fruits
# output ['banana', 'apple', 'kiwi', 'banana', 'pear', 'apple', 'orange']
fruits.append('grape')  # append grape at the end of array
fruits
# output ['banana', 'apple', 'kiwi', 'banana', 'pear', 'apple', 'orange', 'grape']
fruits.sort()
fruits
# output ['apple', 'apple', 'banana', 'banana', 'grape', 'kiwi', 'orange', 'pear']

len(fruits)  # length of fruits array
# output 8

# loop and print each fruit
for fruit in fruits:
  print(fruit)
  
empty_set = set()

basket = {'apple', 'orange', 'apple', 'pear', 'orange', 'banana'}
print(basket)                      # show that duplicates have been removed
# output {'orange', 'banana', 'pear', 'apple'}

# check if orange is in basket set
print('orange' in basket)
# output true

# convert a string to a set of letters - sets contains no duplicates
set_a = set('abcd')
set_b = set('bcde')

# the operations below returns new sets
# print letters in set_a but not in set_b - difference
print(set_a - set_b)
# output {'a'}

# print set letters that is in either set a or b - union
print(set_a | set_b)
# output {'a', 'c', 'e', 'b', 'd'}

# print letters that are in both set_a and set_b - intersection
print(set_a & set_b)
# output {'c', 'd', 'b'}

# print letters that are in set_a and set_b when the letters are found in a set but no the other set - symmetric_difference()
print(set_a ^ set_b)
# output {'a', 'e'}

# Creating dictionaries
dict1 = {'color': 'blue', 'shape': 'square', 'volume': 40}
dict2 = {'color': 'red', 'edges': 4, 'perimeter': 15}

# Creating new pairs and updating old ones
dict1['area'] = 25  # {'color': 'blue', 'shape': 'square', 'volume': 40, 'area': 25}
dict2['perimeter'] = 20  # {'color': 'red', 'edges': 4, 'perimeter': 20}

# Accessing values through keys - an KeyError will occur if the key does not exists
print(dict1['shape'])

# You can also use get, which doesn't cause an exception when the key is not found
dict1.get('false_key')  # returns None
dict1.get('false_key', "key not found")  # returns the custom message that you wrote

# Delete item key and return the value if the key does not exists a KeyError occurs
print(dict1.pop('volume'))

# Merging two dictionaries
dict1.update(dict2)  # if a key exists in both, it takes the value of the second dict
dict1  # {'color': 'red', 'shape': 'square', 'area': 25, 'edges': 4, 'perimeter': 20}

# Getting only the values, keys or both (can be used in loops)
dict1.values()  # dict_values(['red', 'square', 25, 4, 20])
dict1.keys()  # dict_keys(['color', 'shape', 'area', 'edges', 'perimeter'])
dict1.items()
# dict_items([('color', 'red'), ('shape', 'square'), ('area', 25), ('edges', 4), ('perimeter', 20)])

# create a shallow copy of dict1
dict3 = dict1.copy()
# dict3 = {'color': 'red', 'shape': 'square', 'area': 25, 'edges': 4, 'perimeter': 20}

a_number = 3 the_complete_number = a_number + a_number #result should be 6 the_the_complete_number = a_number * a_numner #result should be 9 the_the_the_complete_number = a_number - a_number #result should be 0

#math in python: Multiple action x = int(input("Type value for x: ")) y = int(input("Type value for y: ")) z = int(input("Type value for z: ")) print(x / y + z) #you need multiple solution at once. #Go ahead and copy the code to your # .py script to see the results.

number_1 = 2 number_2 = 5 total_number = number_1 * number_2 #the result should be 10 :) total_number2 = number_2 - number_1 #result should be 3 :) number3 = number_1 + number_2 # result should be 7

#math in python: Multiple action x = int(input("Type value for x: ")) y = int(input("Type value for y: ")) z = int(input("Type value for z: ")) print(x * y + z) #you need multiple solution at once. #Go ahead and copy the code to your # .py script to see the results.