#temp 1 print("#################### temp 1 ####################") total_number = oneTwoThree = 1 x1 = 1 __main__ =1 print(total_number, oneTwoThree, id(total_number), id(oneTwoThree)) print (x1, id(x1)) x1 = "hello" print(x1,id(x1)) def a(): '''hello abcdabcd''' pass help(a) x = y = total_number = oneTwoThree = 1 print(total_number, oneTwoThree, x, y) #del x print(total_number, oneTwoThree, x, y) x = 1 y = 1.0 z = 1+1j # class 'complex' i = "abc" j = True print(type(x), type(y), type(z), type(i), type(j)) print(0.5-0.4) print(0.1+0.1+0.1) #temp 2 print("#################### temp 2 ####################") print("########## temp 2 ##########") from decimal import Decimal print(Decimal("0.5") - Decimal("0.4")) print(type(0.1)) x = 10**100 # 1 followed by 100 zeros print(x) print(type(x)) # Still <class 'int'> print(("hello".upper().lower().title() * 3).capitalize().isalnum()) #temp 3 print("#################### temp 3 ####################") name = "john" age = 10 # case 1 place holder codes %s string, %d integer %f float %x hex #print("Name : %s, Age : %s" % (name, age)) print("Name : %s, Age : %d" % (name, age)) # case 2 convert data to str print("Name : " + name +", Age : " + str(age)) # case 3 str.format() print("Name : {}, Age : {}, Name again : {}".format(name, age, name)) # case 4 named arguments print("Name : {n}, Age : {a}, Name again : {n}".format(n=name, a=age)) # eg. print("Double {x}: {x} + {x} = {sum_x}".format(x=5, sum_x = 5 + 5)) # case 5 : f-string python > 3.6 print(f"Name : {name}, Age : {age}, Name again : {name}") x = 5 sum_x = 5+5 print(f"Double {5}: {5} + {5} = {5+5}") print(f"Double {x}: {x} + {x} = {sum_x}") print("#################### temp 4 ####################") name = "john" age = 10 #format numbers price = 49.99 tax = 0.08 total = price * (1 + tax) print(f"Price : ${price:.2f} | Tax : {tax:.1%} | Total: ${total:.2f}") ## f"{variable:[fill][align][width][.precision][type]} print(f"{age:5d}") print('1---5----01---5----0') print(f"{'Name':<10}{'Age':>5}") # < left align, > right align ^ center #print(f"{name:$<10}{age:->5.2f}") print(f"{name:<10}{age:->5.2f}") print(f"{name:<10}{age:->5d}") print(f"{name:<10}{age:->10.2f}") print(f"{name:<<10s}{age:->10.2f}{' ':$<10}") print(f"{'Apple':^10}") #1---5----01---5----0 #Name Age #john 10 # Apple print(f"{42:05}") print(f"{42:0<5}") print(f"{1234567:,}") print(f"{42:5b}") # binary value print(f"{42:5o}") # octal value print(f"{42:5x}") # hex value # scu firnat print(f"{42:5e}") # value in e format print(f"{42:5E}") # value in E format print(f"{13.14564567:.5g}") # 5 sig figure print(f"{11113.14564567:.5g}") # 5 sig figure print(f"{1113.14564567:.5g}") # 5 sig figure print(f"{111113.14564567:.5g}") # 5 sig figure print(f"{111113.14564567:.5G}") # 5 sig figure print(f"{0.14122143:.5%}") # 5 sig figure print("#################### temp 5 ####################") #print(True, False, type(True)) #print(False == 0) x = True and 2 and [1] and {0} and -1.0 and "hello" # truthy value print(x) y = False or 0 or [] or {} or None or 0.00 or ' ' # falsy value print(y) #print(print(" ")) #========================================== default_city = 'kw' city = '' city = city or print("please input city") or default_city print(city) print("#################### temp 6 ####################") name = ["john", "ann", "mary", "peter", ["ryan", 1], 2, 3, [True, 0,0,9, "hello"]] print(name, id(name), type(name)) print(name[0], name[4]) print(name[4][0]) name[0] = ["david", 20] name[4][0]= 'goodman' print(name) del name[1] print(name) print("#################### temp 7 ####################") a=[1,[2,3],4,5,6,7,8,9,['a','b','c']] print(a[8][1]) a=[1,[2,3],4,[5,[[6],7]],8,9,['a','b','c']] print(a[3][1][0][0]) a[0] = 10 print(a) a[1] = 10 print(a) a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] print(a[10], a[-4]) b=slice(0,7,1) # start, end-1, step print(type(b)) print(a[b], a[0:7:1]) print(a[b], a[0:15:7]) x = 2 y = 17 z = 6 b = slice(x,y,z) # start, end-1, step print("aaa") print(a[x:y:z]) print("bbb") print(a[7:2:1]) print(a[7:-1:1]) print(a[7:-1:-1]) print("ccc") print(a[-1:0:-4]) print(a[15:0:-4]) #allow empty value and some functions print(a[-1::-1]) print(a[:10]) # 0:10:1 print(a[::5]) # 0:len(a):5 print(a[0:15:1]) print("ddd") del a[::5] print(a) a.remove(4) print(a) a = [1,2,3,4,5,4,6,7,8,9,10,11,12,13,14,15,16] a.remove(4) print(a) a.clear() print(a) a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] a = [] print(a) a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] a.sort(reverse=True) # change original list print(a) print("eee") b = sorted(a) print(a) print(b) print("fff") a=[1,2,3,4,9,10,11,12,5,6,7,8,13,14,15] a.sort() print(a) b = sorted(a,reverse=True) print(a) print(b) a=[1,2,3,4,9,10,11,12,5,6,6,7,8,13,14,15] print(a.count(6), a.index(6)) print(a.count(0), a.index(6)) #print(a.count(0), a.index(0)) #error appear for index 0 not in the list print("#################### temp 8 ####################") #temp 8, for tuple a = 1,2,3,4,9,10,11,12,5,6,6,8,13,14,15 print(a.count(0),a.index(6)) print(a[0]) #a[0]=10 #a.sort() print(a) b = sorted(a,reverse=True) print(a) print(b) b = 1, print(b) b = () print(b, type(b)) a = {1,2,"a",3,4,"",9,10,"b",11,12,5,6,"a",6,8,13,14,15} print(type(a)) print(a) print("ggg") a = [1,2,"a",3,4,"b",9,10,"b",11,12,5,6,"a",6,8,13,14,15] #a = set(a) #print(type(a)) #a = list(a) a = list(set(a)) print(a) a = {1,2,"a",3,4,"",9,10,"b",11,12,5,6,"a",6,8,13,14,15} a.add(16) print(a) a.update(a, {17, 18}) print(a) a = {1,2,3,4} b = {3,4,5,6} print(a | b) print(a & b) print(a - b) print(a ^ b) print("#################### temp 9 ####################") #temp 9 print("Hello \ World!") print('''Hello Wor ld!''') a = (1, 1+1 ) print(a, type(a)) if 1: x = 1 y=1 print("#################### temp 10 ####################") #temp 10 name = 'name' d = {'name' : "john", # 'name' = "john" "age": 10+1, } print(d['name']) print(d['age']) name = 'age' print(d['name'],d['age']) print(d[name]) d = {"name" : "john", "age": 10+1, True : 12, (1,2): 30, } name = 'age' print(d[name]) print(d[(1,2)], d[True], d) print("#################### temp 11 ####################") #temp11 c = a = [1,2,3] b = [1,2,3] print(id(a), id(c), id(b)) print(id(a[0]), id(c[0]), id(b[0])) d = {"name" : "john", "age": 10, "gender" : "male" } del d["gender"] print(d) d["name"] = "peter" print(d) d["mame"] = "prince building" print(d) print(d.keys()) for i in d.keys(): print(i) print(d.values()) print(d.items()) print("#################### temp 12 ####################") #temp 12 #NO 1 result = 7 - 4 + 3 * 6 / 2 ** 2 % 5 print ('01', result) result = ((7 - 4) + (((3 * 6) / (2 ** 2)) % 5)) print ('01', result) #NO 2 result = 12 - 2 * 5 > 3 and 8 % 5 == 3 or not 4 + 1 > 7 print ('02', result) result = (((12 - (2 * 5)) > 3) and ((8 % 5) == 3)) or (not ((4 + 1) > 7)) print ('02', result) print("#################### temp 13 ####################") #temp 13 def a(x, y, z=2): result = x + y + z print(f"result = {result}") print("x =", x, "y =", y, "z =", z) print(f"x = {x} y = {y} z = {z}") return result print(a(3, 4)) result = a(y=4,z=5,x=6) + a(7,8,9) print(result) print(globals()) print(a('a', 'b', 'c')) print(a("john"," ", "lee"))