Python 3.11.0 (main, Oct 24 2022, 18:26:48) [MSC v.1933 64 bit (AMD64)] on win32 Type "copyright", "credits" or "license()" for more information. DreamPie 1.2.1 >>> xs = 'Ahoj, světe!' >>> xs[:3] 0: 'Aho' >>> len(xs) 1: 12 >>> len(xs) / 2 2: 6.0 >>> xs[:6.0] Traceback (most recent call last): File "<pyshell#4>", line 1, in <module> xs[:6.0] ~~^^^^^^ TypeError: slice indices must be integers or None or have an __index__ method >>> len(xs) // 2 3: 6 >>> 12 // 2 4: 6 >>> 13 // 2 5: 6 >>> xs[:len(xs) // 2] 6: 'Ahoj, ' >>> xs[len(xs) // 2:] 7: 'světe!' >>> xs[len(xs) // 2:] + xs[:len(xs) // 2] 8: 'světe!Ahoj, ' >>> xs[:len(xs) // 2] + xs[len(xs) // 2:] 9: 'Ahoj, světe!' >>> (len(xs) + 1) // 2 10: 6 >>> import math >>> dir(math) 11: ['__doc__', '__loader__', '__name__', '__package__', '__spec__', 'acos', 'acosh', 'asin', 'asinh', 'atan', 'atan2', 'atanh', 'cbrt', 'ceil', 'comb', 'copysign', 'cos', 'cosh', 'degrees', 'dist', 'e', 'erf', 'erfc', 'exp', 'exp2', 'expm1', 'fabs', 'factorial', 'floor', 'fmod', 'frexp', 'fsum', 'gamma', 'gcd', 'hypot', 'inf', 'isclose', 'isfinite', 'isinf', 'isnan', 'isqrt', 'lcm', 'ldexp', 'lgamma', 'log', 'log10', 'log1p', 'log2', 'modf', 'nan', 'nextafter', 'perm', 'pi', 'pow', 'prod', 'radians', 'remainder', 'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'tau', 'trunc', 'ulp'] >>> math.floor(12.3) 12: 12 >>> math.floor(12.7) 13: 12 >>> math.ceil(12.3) 14: 13 >>> math.ceil(12.7) 15: 13 >>> math.trunc(12.3) 16: 12 >>> math.trunc(12.7) 17: 12 >>> xs 18: 'Ahoj, světe!' >>> ',' in xs 19: True >>> xs.index(',') 20: 4 >>> xs[:4] 21: 'Ahoj' >>> xs[:xs.index(',')] 22: 'Ahoj' >>> xs.index('a') Traceback (most recent call last): File "<pyshell#26>", line 1, in <module> xs.index('a') ValueError: substring not found >>> xs = 'Anarchista a Anarchistka' >>> xs 23: 'Anarchista a Anarchistka' >>> xs.lower() 24: 'anarchista a anarchistka' >>> xs.upper() 25: 'ANARCHISTA A ANARCHISTKA' >>> xs 26: 'Anarchista a Anarchistka' >>> xs.title() 27: 'Anarchista A Anarchistka' >>> ys = xs.lower() >>> ys 28: 'anarchista a anarchistka' >>> ys.title() 29: 'Anarchista A Anarchistka' >>> xs 30: 'Anarchista a Anarchistka' >>> xs.swapcase() 31: 'aNARCHISTA A aNARCHISTKA' >>> 'a'.isalpha() 32: True >>> 'aá'.isalpha() 33: True >>> 'aář'.isalpha() 34: True >>> xs = '12 to by nešlo 24' >>> xs 35: '12 to by nešlo 24' >>> '12 to by nešlo 24'.strip() 36: '12 to by nešlo 24' >>> '12 to by nešlo 24'.strip('2') 37: '12 to by nešlo 24' >>> '12 to by nešlo 24'.strip('42') 38: '12 to by nešlo ' >>> '12 to by nešlo 24'.strip('42 ') 39: '12 to by nešlo' >>> '12 to by nešlo 24'.strip(' 42') 40: '12 to by nešlo' >>> '12 to by nešlo 24'.strip('1 42') 41: 'to by nešlo' >>> '12 to by nešlo 24'.rstrip('1 42') 42: '12 to by nešlo' >>> '12 to by nešlo 24'.lstrip('1 42') 43: 'to by nešlo 24' >>> ' to by nešlo '.strip() 44: 'to by nešlo' >>> ' \t\t to by nešlo \n\t '.strip() 45: 'to by nešlo' >>>