# 數(shù)學相關模塊
import math
r = math.floor(3.2) # 向下取整
print(r)
r = math.ceil(4.5)  # 向上取整
print(r)
r = round(3.4999)  # 四舍五入
print(r)
r = math.pow(3,4)  # =3**4
print(r)
r = math.sqrt(25)  # 開平方
print(r)
r = math.fabs(-0.23) # 絕對值(小數(shù))
print(r)
r = abs(-2)     # 絕對值
print(r)
r = math.modf(3.14) # 拆分小數(shù)和整數(shù)
print(r)
r = math.copysign(3,-5) #-5的符號賦給3
print(r)
lt = [1,4,5,7]    # 計算lt中數(shù)字的和(結果浮點數(shù)）
r = math.fsum(lt)
print(r)
r = sum(lt)     # 同上（結果整數(shù)）
print(r)
print(math.pi)    # 圓周率
print(math.e)    # 自然對數(shù)
# 隨機數(shù)模塊
import random
r = random.random() # 隨機獲取0~1小數(shù)
print(r)
lt = [2,3,5,7,'A','C','d']
r = random.choice(lt) # 隨機獲取lt中一個值
print(r)
random.shuffle(lt) #打亂列表
print(lt)
r = random.randrange(5,15,2) #獲取制定范圍內隨機的整數(shù)
print(r)
r = random.uniform(4,24)   #獲取制定范圍內隨機數(shù)
print(r)
# 內建函數(shù)
nums = [2,3,5,7,0,23,21,-11,0.4]
print(max(nums))    # 獲取最大值
print(min(nums))    # 獲取最小值
# 進制相關
hex(3)
oct(3)
bin(3)
print(ord('a')) # 獲取相對應的ascii碼
print(chr(90))  # 獲取ascii碼相對應的字符
num = 99
var = 'num + 1'
nums = eval(var) # 將python字符串當做代碼執(zhí)行 慎用
print(nums)