文字のメソッド（関数）

式：
print('###################################')
s = 'My name is Masatoshi. Call me Toshi.'
print(s)

print(s.startswith('He'))
print(s.startswith('She'))
print(s.capitalize())
print(s.upper())
print(s.lower())
print(s.replace('Toshi', 'Mash'))

結果：

#

My name is Masatoshi. Call me Toshi.
False
False
My name is masatoshi. call me toshi.
MY NAME IS MASATOSHI. CALL ME TOSHI.
my name is masatoshi. call me toshi.
My name is Masatoshi. Call me Mash.