随笔分类 - python
摘要：from fractions import Fraction value = 4.2 print(Fraction(value).limit_denominator())
阅读全文
摘要：import math print(math.fabs(-2.1)) print(math.fabs(-0.0)) print(math.fabs(10.1)) print(math.fabs(0.0))
阅读全文
摘要：print("Addition of two complex numbers : ",(4+3j)+(3-7j)) print("Subtraction of two complex numbers : ",(4+3j)-(3-7j)) print("Multiplication of two complex numbers : ",(4+3j)*(3-7j)) print("D...
阅读全文
摘要：import fractions f1 = fractions.Fraction(2, 3) f2 = fractions.Fraction(3, 7) print('{} + {} = {}'.format(f1, f2, f1 + f2)) print('{} - {} = {}'.format(f1, f2, f1 - f2)) print('{} * ...
阅读全文
摘要：def is_Power_of_three(n): while (n % 3 == 0): n /= 3; return n == 1; print(is_Power_of_three(9)) print(is_Power_of_three(81)) print(is_Power_of_three(21)) ...
阅读全文
摘要：def is_Power_of_four(n): while n and not (n & 0b11): n >>= 2 return (n == 1) print(is_Power_of_four(4)) print(is_Power_of_four(16)) print(is_Power_of_four(255))
阅读全文
摘要：def is_arithmetic(l): delta = l[1] - l[0] for index in range(len(l) - 1): if not (l[index + 1] - l[index] == delta): return False return True print(i...
阅读全文
摘要：def is_geometric(li): if len(li) <= 1: return True # Calculate ratio ratio = li[1]/float(li[0]) # Check the ratio of the remaining for i in range(1, len(li))...
阅读全文
摘要：def add_binary_nums(x,y): max_len = max(len(x), len(y)) x = x.zfill(max_len) y = y.zfill(max_len) result = '' carry = 0 for i in...
阅读全文
摘要：import re def end_num(string): #以一个数字结尾字符串 text = re.compile(r".*[0-9]$") if text.match(string): return True else: return False print(end_num('abcdef'...
阅读全文
摘要：def is_decimal(num): import re #以数字开头，小数点后保留1位数字或两位数字或者没有小数部分 dnumre = re.compile(r"""^[0-9]+(\.[0-9]{1,2})?$""") result = dnumre.search(num) return bool(result) prin...
阅读全文
摘要：将结尾的Road用Rd.替换
阅读全文
摘要：x = frozenset([1, 2, 3, 4, 5]) y = frozenset([3, 4, 5, 6, 7]) #如果x与y没有公共元素，返回true print(x.isdisjoint(y)) #返回x与y不一样的元素 print(x.difference(y)) #返回x与y并集 print(x | y)
阅读全文
摘要：setx = set(["apple", "mango"]) sety = set(["mango", "orange"]) setz = set(["mango"]) issubset = setx = sety print(issuperset) issubset = setz = setz print(issuperset)
阅读全文
摘要：num_set = set([0, 1, 3, 4, 5]) num_set.pop() print(num_set) num_set.pop() print(num_set)
阅读全文
摘要：#Create a new set num_set = set([0, 1, 2, 3, 4, 5]) #Discard number 4 num_set.discard(4) print(num_set)
阅读全文
摘要：#Create a set seta = set([5, 10, 3, 15, 2, 20]) #Find maximum value print(max(seta)) #Find minimum value print(min(seta))
阅读全文
摘要：#Intersection setx = set(["green", "blue"]) sety = set(["blue", "yellow"]) setz = setx & sety print(setz)
阅读全文
摘要：#Union setx = set(["green", "blue"]) sety = set(["blue", "yellow"]) seta = setx | sety print(seta)
阅读全文
摘要：setx = set(["apple", "mango"]) sety = set(["mango", "orange"]) #Symmetric difference setc = setx ^ sety print(setc)
阅读全文