How to use 'fstring format float' in Python
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48 def format_float(x): 49 try: 50 return "%10.5f" % x 51 except: 52 return str(x)
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24 def float_str(f, min_digits=2, max_digits=6): 25 """ 26 Returns a string representing a float, where the number of 27 significant digits is min_digits unless it takes more digits 28 to hit a non-zero digit (and the number is 0 < x < 1). 29 We stop looking for a non-zero digit after max_digits. 30 """ 31 if f >= 1 or f <= 0: 32 return str(round_float(f, min_digits)) 33 start_str = str(round_float(f, max_digits)) 34 digits = start_str.split(".")[1] 35 non_zero_indices = [] 36 for i, digit in enumerate(digits): 37 if digit != "0": 38 non_zero_indices.append(i + 1) 39 # Only saw 0s. 40 if len(non_zero_indices) == 0: 41 num_digits = min_digits 42 else: 43 # Of the non-zero digits, pick the num_digit'th of those (including any zeros) 44 min_non_zero_indices = range(non_zero_indices[0], non_zero_indices[-1] + 1)[:min_digits] 45 num_digits = min_non_zero_indices[-1] 46 return str(round_float(f, num_digits))