Rhestr o enghreifftiau bach o god ar gyfer sylfeini Python

Erbyn diwedd y cwrs fe ddylech chi allu:

Darllen a disgrifio'r hyn maent yn eu gwneud.
Ysgrifennu enghreifftiau eich hunain.
Cyfuno'r cysyniadau er mwyn gwneud pethau mwy cymhleth.

Nodwch taw is-set fach o alluoedd Python yw hon

Aseinio newidynnau a thriniaeth algebraidd

import math

a = 3
b = a + 1
print(math.sqrt(a ** 2 + b ** 2))

Allbwn?



In [1]:

    
import math
a = 3
b = a + 1
print(math.sqrt(a ** 2 + b ** 2))

5.0

Datganiadau amodol sengl

import random

n = random.randint(0, 5)
if n == 4:
    print(n)
else:
    print(-1)

Allbwn?



In [2]:

    
import random
n = random.randint(0, 5)
if n == 4:
    print(n)
else:
    print(-1)

-1

Datganiadau amodol ailadroddol

import random

n = random.randint(0, 5)
number_of_samples = 1
while n != 4:
    number_of_samples += 1
    n = random.randint(0, 5)

Allbwn?



In [3]:

    
import random
n = random.randint(0, 5)
number_of_samples = 1
while n != 5:
    number_of_samples += 1
    n = random.randint(0, 5)
print(number_of_samples)

Ffwythiannau a rhestrau

import random

def cael_samplau(terfan_uchaf=5):
    """
    Allbynnu'r hapsamplau o 0 i'r `terfan_uchaf` nes
    samplir y `terfan_uchaf`.
    """
    samplau = [random.randint(0, terfan_uchaf)]

    while samplau[-1] != terfan_uchaf:
        samplau.append(random.randint(0, terfan_uchaf))

    return samplau

print(cael_samplau(terfan_uchaf=5))

Allbwn?



In [4]:

    
def cael_samplau(terfan_uchaf=5):
    """
    Allbynnu'r hapsamplau o 0 i'r `terfan_uchaf` nes
    samplir y `terfan_uchaf`.
    """
    samplau = [random.randint(0, terfan_uchaf)]
    
    while samplau[-1] != terfan_uchaf:
        samplau.append(random.randint(0, terfan_uchaf))

    return samplau

print(cael_samplau(terfan_uchaf=5))









    



[0, 4, 1, 3, 1, 4, 4, 4, 5]

Iteru

nifer_o_ddyddiau = 12
nifer_o_anrhegion = 0
for dydd in range(nifer_o_ddyddiau + 1):
    for anrhegion in range(dydd + 1):
        nifer_o_anrhegion += anrhegion
print(nifer_o_anrhegion)

Allbwn?



In [5]:

    
nifer_o_ddyddiau = 12
nifer_o_anrhegion = 0
for dydd in range(nifer_o_ddyddiau + 1):
    for anrhegion in range(dydd + 1):
        nifer_o_anrhegion += anrhegion
print(nifer_o_anrhegion)

Ffwythiannau Ailadroddol

def fibonacci(n):
    """
    Allbynnu'r nfed rhif fibonacci gan ddefnyddio
    ffwythiant ailadroddol.
    """
    if n in [0, 1]:
        return 1
    return fibonacci(n - 1) + fibonacci(n - 2)

print(fibonacci(5))

Allbwn?



In [6]:

    
def fibonacci(n):
    """
    Allbynnu'r nfed rhif fibonacci gan ddefnyddio
    ffwythiant ailadroddol.
    """
    if n in [0, 1]:
        return 1
    return fibonacci(n - 1) + fibonacci(n - 2)

print(fibonacci(5))

Rhaglennu gwrthrych-gyfeiriadol

class RhifCymhlyg:
    """
    Dosbarth ar gyfer rhifau cymhlyg o'r ffurf $a + i b$
    """
    def __init__(self, a, b):
        self.a = a
        self.b = b

    def __add__(self, llall):
        return RhifCymhlyg(self.a + other.a, self.b + other.b)

    def __mul__(self, llall):
        return RhifCymhlyg(
            self.a * llall.a - self.b * llall.b, 
            self.b * llall.a + self.a * llall.b
        )
    def __repr__(self):
        return f"{self.a} + {self.b}i"

z1 = RhifCymhlyg(1, -2)
z2 = RhifCymhlyg(51, 0)
print(z1 * z2)

Allbwn?



In [7]:

    
class RhifCymhlyg:
    """
    Dosbarth ar gyfer rhifau cymhlyg o'r ffurf $a + i b$
    """
    def __init__(self, a, b):
        self.a = a
        self.b = b
       
    def __add__(self, llall):
        return RhifCymhlyg(self.a + other.a, self.b + other.b)
    
    def __mul__(self, llall):
        return RhifCymhlyg(
            self.a * llall.a - self.b * llall.b, 
            self.b * llall.a + self.a * llall.b
        )
    def __repr__(self):
        return f"{self.a} + {self.b}i"
    
z1 = RhifCymhlyg(1, -2)
z2 = RhifCymhlyg(51, 0)
print(z1 * z2)



In [ ]: