"values are rounded to the closest multiple of 10 to the power minus ndigits; if two multiples are equally close, rounding is done toward the even choice." 如果距离两边一样远,会保留到偶数的一边。比如round(0.5)和round(-0.5)都会保留到0,而round(1.5)会保留到2。 Python 2.7 中的结果如下: ...
2)fork,vincounter.items()}# 取出频率最高的前三个元素top_freq=dict(sorted(freq.items(),key=lambdax:x[1],reverse=True)[:3])# 绘制饼状图labels=top_freq.keys()sizes=top_freq.values()plt.pie(sizes,labels=labels
The NumPy function uses the round half to even strategy, just like Python’s built-in round() function. For example, the following code rounds all of the values in data to three decimal places: Python >>> np.round(data, decimals=3) array([[-0.69 , -2.105, -0.788, 0.934], [ ...
6、考虑使用decimal模块:如果你需要更精确的控制或更可靠的舍入行为,可以考虑使用Python的decimal模块,这个模块提供了Decimal类,用于高精度的十进制数运算和舍入。 7、了解Python版本之间的差异:不同版本的Python可能对round()函数的行为有所不同,特别是Python 2和Python 3在舍入到偶数的方式上有所不同,确保你了解...
, ndigits])Return the floating point value number rounded to ndigits digits after the decimal point. If ndigits is omitted, it returns the nearest integer to its input. Delegates to number.__round__(ndigits).For the built-in types supporting round(), values are ...
3.3.2官方文档对round的定义 round(number[,ndigits]) Return the floating point valuenumberrounded tondigitsdigits after the decimal point. Ifndigitsis omitted, it defaults to zero. Delegates tonumber.__round__(ndigits). For the built-in types supportinground(), values are rounded to the clos...
Delegates tonumber.__round__(ndigits).For the built-in types supportinground(), values are rounded to the closest multiple of 10 to the power minusndigits; if two multiples are equally close, rounding is done toward the even choice (so, for example, bothround(0.5)andround(-0.5)are0, ...
Positive precision values round after the decimal point, while negative values round to the left of the decimal (tens, hundreds, etc.). Note that precision=0 returns a float (3.0) rather than an integer, unlike when no precision is specified (which returns an integer). ...
# Python round() method to round half to even print(round(2.5)) # 2 print(round(3.5)) # 4 print(round(-2.5)) # -2 Powered By Conclusion Rounding up numbers is an important technique in programming, as it makes it easier to handle numerical values. It is also essential in statistic...
Q4. In Python, the round() function rounds up or down? The round() function can round the values up and down both depending on the situation. For <0.5, it rounds down, and for >0.5, it rounds up. For =0.5, the round() function rounds the number off to the nearest even number....