skip = False # 判断学号是否重复的条件 for stu in stu_list: if stu["stu_id"] == stu_id: skip = True break if skip: # 如果学号重复,则为执行下面这一句 print("该学生已经已经被添加了") else: stu_info = {"stu_id": stu_id, "stuName": stu_name, "stuSex": stu_sex} # 定义一...
[is_leap_year(year)] total = 0 for index in range(month - 1): total += days_of_month[index] return total + date def main(): print(which_day(1980, 11, 28)) print(which_day(1981, 12, 31)) print(which_day(2018, 1, 1)) print(which_day(2016, 3, 1)) if __name__ ==...
ssp585: 2015-2100). Therefore, we can select our period of interest and then load the subset of data for more convenience in further analyses. But before that, the time coordinate is in "object" format, which we need to convert to datetime to be able to easily...
However, you might actually be looking for information about the current interpreter's word size, which will be the same as the machine's word size in most cases. That information is still available in Python 3 as sys.maxsize, which is the maximum value representable by a signed word. Equ...
(range(0, 81, 5))] # 每个年龄段的人口 for year_index, year in enumerate(years): for age_index, age in enumerate(ages): data.append([year, age, (1+0.1*year_index)*populations[age_index]]) plot_data = pd.DataFrame(data, columns=['year', 'age', 'population']) plot_data.head...
installalso creates${prefix}/bin/python3which refers to${prefix}/bin/python3.X. If you intend to install multiple versions using the same prefix you must decide which version (if any) is your "primary" version. Install that version usingmake install. Install all other versions usingmake ...
["商业贷款利率"] >= 6.0].index for year in high_rate_years: plt.annotate(f'{df.loc[year, "商业贷款利率"]}%', xy=(year, df.loc[year, "商业贷款利率"]), xytext=(0, 10), textcoords='offset points', ha='center', va='bottom', color='red') plt.title("中国房贷利率变化趋势(...
sys模块有一个argv变量,用list存储了命令行的所有参数。argv至少有一个元素,因为第一个参数永远是该.py文件的名称,例如: 运行python3 hello.py获得的sys.argv就是['hello.py']; 先解释什么是命令行参数。 $ Python --version Python2.7.6 这里的--version就是命令行参数。如果你使用Python --help可以看到更多...
"""defcounting(start,end):foriinrange(start,end+1):print(i) 在这个函数counting()中,我们在括号里添加了两个内容,分别为start和end,这两个变量在这里被称作这个函数的参数,当我们调用这个函数时,需要输入对应的参数,数量上必须要严格对应。在这个函数的内部,我们可以将参数当作变量使用,以给予函数更多的灵活...
year - year - ((today.month, today.day) < (month, day)) print("Your age is",age,"years.") Output Your age is 32 years. Using dateutil method The other module available in python is dateutil, which provides a relativedelta() function to calculate the difference between the birth ...