李剛佑python集合set字典dict統計字元數目37,241不同字元數1,251

file = open('金融常識.txt','r',encoding='utf-8')
reading = file.read()
file.close()
print('檔案字元characters數:', len(reading))
mySet = set(reading)
print(f'字元數目{len(reading):,}，不同字元數{len(mySet):,}')
myDict = dict()
for j in mySet:
    myDict[j] = 0
for i in reading:
    myDict[i] += 1
for j in mySet:
    print(f"字元「{j}」出現{myDict[j]:,}次數")
print(f'字元數目{len(reading):,}，不同字元數{len(mySet):,}')
print(f'李剛佑統計左引號(出現次數{myDict['(']:,}')
print(f'李剛佑統計右引號(出現次數{myDict[')']:,}')
print(f'李剛佑統計504美題四個選項至少有{504*4:,}')