Day - CSV 文件、ASCII、字符串方法

f =open("sample.txt", "r")with open("sample.txt",’r’) as f:

player,scorevirat,80rohit,90dhoni,100

import csvf =open("score.csv", "r")csv_reader = csv.reader(f)for row in csv_reader:    print(row)f.close()

['player', 'score']['virat', '80']['rohit', '90']['dhoni', '100']

for row in range(5):    for col in range(row+1):        print(chr(col+65), end=' ')    print()

a a b a b c a b c d a b c d e 

for row in range(5):    for col in range(5-row):        print(chr(row+65), end=' ')    print()

a a a a a b b b b c c c d d e 

name = 'pritha'for letter in name:    print(letter,end=' ')

name = 'pritha'i=0while i<len(name):    print(name[i],end=' ')    i+=1

txt = "hello, and welcome to my world."x = txt.capitalize()print (x)

txt = "hello, and welcome to my world."first = txt[0]first = ord(first)-32first = chr(first)print(f'{first}{txt[1:]}')

txt = "hello, and welcome to my world!"x = txt.casefold()print(x)

txt = "hello, and welcome to my world!"for letter in txt:    if letter>='a' and letter<'z':        letter = ord(letter)+32        letter = chr(letter)    print(letter,end='')

txt = "i love apples, apple is my favorite fruit"x = txt.count("apple")print(x)

txt = "i love apples, apple is my favorite fruit"key="apple"l=len(key)count=0start=0end=lwhile end<len(txt):    if txt[start:end]==key:        count+=1    start+=1    end+=1else:    print(count)

txt = "i love apples, apple is my favorite fruit"key="apple"l=len(key)start=0end=lwhile end<len(txt):    if txt[start:end]==key:        print(start)        break    start+=1    end+=1

7

txt = "i love apples, apple is my favorite fruit"key="apple"l=len(key)start=0end=lfinal=0while end<len(txt):    if txt[start:end]==key:        final=start    start+=1    end+=1else:    print(final)

15

for row in range(4):    for col in range(7-(row*2)):        print((col+1),end=" ")     print()

1 2 3 4 5 6 7 1 2 3 4 5 1 2 3 1 

for row in range(5):    for col in range(5-row):        print((row+1)+(col*2),end=" ")     print()

1 3 5 7 9 2 4 6 8 3 5 7 4 6 5