Python range function All In One

Python range function All In One

range 函数

函数语法

range(stop)
range(start, stop[, step])

参数说明：

start: 计数从 start 开始。默认是从 0 开始。例如 range(5) 等价于 range(0, 5)
stop: 计数到 stop 结束，但不包括 stop。例如：range(0, 5) 是 [0, 1, 2, 3, 4] 没有 5
step：步长，默认为 1。例如：range(0, 5) 等价于 range(0, 5, 1)

RGB color 0 ~ 255
二进制 2 ** 8 => 256

# 简写
for i in range(255):
  print("i =", i)

# 等价于
for i in range(0, 255):
  print("i =", i)

# 等价于，全写
 for i in range(0, 255, 1):
  print("i =", i)

demos

#!/usr/bin/python3
from time import sleep

n = 30
m = 2
# while True:
while m > 0:
  m = m - 1
  for i in range(0, n, 1):
    if(i % 3 == 0):
      print("\n❌ R =", i)
    elif(i % 3 == 1):
      print("✅ G =", i)
    else:
      print("🅿️ B =", i)
  print("🐍 m =", m)
  # sleep(1)

"""
$ py3 ./range.py
$ py3 ./range.py | grep "🐍"

https://www.runoob.com/try/runcode.php?filename=HelloWorld&type=python3
https://www.runoob.com/python3/python3-func-range.html

"""

➜  Python git:(master) ✗ py3 ./range.py | grep "🐍"
🐍 m = 1
🐍 m = 0
➜  Python git:(master) ✗ py3 ./range.py | grep "✅"
✅ G = 1
✅ G = 4
✅ G = 7
✅ G = 10
✅ G = 13
✅ G = 16
✅ G = 19
✅ G = 22
✅ G = 25
✅ G = 28
✅ G = 1
✅ G = 4
✅ G = 7
✅ G = 10
✅ G = 13
✅ G = 16
✅ G = 19
✅ G = 22
✅ G = 25
✅ G = 28
➜  Python git:(master) ✗ 

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refs

https://www.runoob.com/try/runcode.php?filename=HelloWorld&type=python3
https://www.runoob.com/python3/python3-func-range.html

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