Python 编程快速入门

Python 编程快速入门 | 极客日志

print("嗨，欢迎来到 Python 世界！")

# Python 3: 显示 n 个数以内的斐波纳契（Fibonacci）序列
def fib(n):
    a, b = 0, 1
    while a < n:
        print(a, end=' ')
        a, b = b, a+b
    print()

fib(1000)

x = 1
x += 1
x, y, z = 1, 2, "Hello!"
x = y = z = 99.9

# Arithmetic operators
a = 5
b = 2
print(a + b) # Output: 7
print(a / b) # Output: 2.5
print(a % b) # Output: 1

# Comparison operators
x = 10
y = 5
print(x > y) # Output: True
print(x == y) # Output: False

# Logical operators
a = True
b = False
print(a and b) # Output: False
print(a or b) # Output: True

# Bitwise operators
x = 0b1010 # Binary representation of 10
y = 0b1100 # Binary representation of 12
print(x & y) # Output: 0b100 (binary representation of 8)
print(x | y) # Output: 0b1110 (binary representation of 14)

# Assignment operators
a = 5
a += 2
print(a) # Output: 7

# Identity operators
x = [1, 2, 3]
y = x
z = [1, 2, 3]
print(x is y) # True
print(x is z) # False

# Membership operators
numbers = [1, 2, 3, 4, 5]
print(2 in numbers) # Output: True
print(6 not in numbers) # Output: True

if condition:
    # 如果 condition 为 True，则执行这里的语句
elif condition2:
    # 如果 condition 为 False，但是 condition2 为 True，则执行这里的语句
else:
    # 如果上述所有条件都为 False，则执行这里的语句

num = 5
if num > 0:
    print("这个数是正数")
elif num == 0:
    print("这个数是零")
else:
    print("这个数是负数")

for variable in sequence:
    # 在这里执行循环体代码

numbers = [1, 2, 3, 4, 5]
for num in numbers:
    print(num)

while condition:
    # 在这里执行循环体代码

total = 0
i = 1
while i <= 10:
    total += i
    i += 1
print("1 到 10 的和为:", total)

def function_name(parameters):
    """
    Docstring: 函数的文档字符串，用于描述函数的用途和参数。
    """
    # code block to be executed
    return value # 可选

def greet(name):
    """
    此函数对作为参数传送的人表达欢迎。
    """
    print("嗨，" + name + "，欢迎光临！")

greet("韩梅梅")

import math
import numpy as np
from my_module import my_function

PI = 3.14159
name = "John"

import math

PI = 3.14159

def area_of_circle(radius):
    return PI * radius ** 2

def main():
    r = 5
    area = area_of_circle(r)
    print("The area of the circle with radius", r, "is", area)

if __name__ == '__main__':
    main()

import openpyxl

# 打开原始 Excel 表格文件
workbook = openpyxl.load_workbook('原始数据.xlsx')

# 选择原始 Excel 表格中的第一个工作表
worksheet = workbook.active

# 创建一个新的工作簿
new_workbook = openpyxl.Workbook()

# 选择新工作簿中的第一个工作表
new_worksheet = new_workbook.active

# 将原始 Excel 表格中的'姓名'和'语文成绩'两列数据提取出来，并添加到新工作表中
for row in worksheet.iter_rows(values_only=True):
    name, score = row[0], row[3]
    new_worksheet.append([name, score])

# 保存新工作簿到 Excel 文件中
new_workbook.save('姓名与语文成绩.xlsx')

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