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use: 时间模块, 提供了各种与时间相关的函数 import: import time Common method: time.time() get timestamp 1661524128.4208298 time.ctime() Get the current time and return a human-readable string Fri Aug 26 14:44:07 2022 time.sleep(secs) Pause execution for the given number of seconds , time.sleep(1) pauses for 1 second time.localtime() Convert a timestamp to a struct_time of the current time zone time.struct_time(tm_year=2022, tm_mon=8, tm_mday=26, tm_hour=14, tm_min=28, tm_sec=48, tm_wday=4, tm_yday=238, tm_isdst=0) time.gmtime() struct_time that converts a timestamp to UTC time zone (time zone 0)...

use: 日历模块，提供了对日期的一些操作方法，和生成日历的方法。 import: import calendar Common method: calendar.prcal(year, w=0, l=0, c=6, m=3) Used to get the calendar for the specified year calendar.month(year, month, w=0, l=0) Used to get the calendar for a month calendar.isleap(year) Determine if it is a leap year calendar.leapdays(year1,year2)‍ Detect the number of leap years between two years calendar.setfirstweekday(calendar.SUNDAY) Set the start day of the week Example: import calendarprint(calendar.firstweekday()) # 返回当前设置的每星期的第一天的数值。0 是星期一（默认值），6 是星期天。calendar.setfirstweekday(calendar.SUNDAY)print(calendar.firstweekday()) # 设置的每星期的第一天的数值为SUNDAYprint(calendar.isleap(2022)) # 判断是不是闰年 如果 year 是闰年则返回 True ,否则返回 False。print(calendar....

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One of the Python text analysis series: NLTK corpus download 当前浏览器不支持播放音乐或语音，请在微信或其他浏览器中播放 Ordinary Day Music: Mao Buyi / He Jiong / Huang Lei / Zhang Yixing / Peng Yuchang / Zhang Zifeng Generally speaking, data analysis includes structured and unstructured data analysis. The former is for example structured data analysis in common list format, while the latter is for data analysis in unstructured formats such as text, images and videos. In fact, similar to structured data, plain text is also a common data format....

One of the introduction of youth information technology exam: Blue Bridge Youth Information Technology Grade Exam (Blue Bridge etc.) We know that the data stored in the computer are all binary numbers, so what is the data type? What is it good for? For the 8-bit binary number 0 1 000 0 0 1, if interpreted as an integer, it is 65; if interpreted as an ASCII character, it is the letter A....

Prepare data and associated libraries Mainly use Pandas library and Seaborn library. import pandas as pdimport numpy as npimport seaborn as sns%matplotlib inline Generate 4 sets of data and convert to DataFramedata type xarray = np.linspace(0,10,100)#生成从0倒10，100个数yarray = xarray**3+np.random.normal(0,100,100) # y=x^3+正态扰动项zarray = -100*xarray+np.random.normal(0,10,100) # y=-100x+正态扰动项warray = 200*xarray**0.5+np.random.normal(0,10,100) x y z w 0 0 66.5297 -7.81256 14.5319 1 0.10101 -34.835 -18.8105 65.9947 2 0.20202 37.5717 -21.8944 96.7367 3 0.30303 140.38 -28.7846 101....

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Python3 environment construction In this chapter, we will show you how to build a Python3 development environment locally. Python3 is available on multiple platforms including Windows, Linux and Mac OS X. Unix (Solaris, Linux, FreeBSD, AIX, HP/UX, SunOS, IRIX, etc.) Win9x/NT/2000 Macintosh (Intel, PPC, 68K) OS/2 DOS (multiple DOS versions) PalmOS Nokia mobile phones Windows CE Acorn/RISC OS BeOS Amiga VMS/OpenVMS QNX VxWorks Psion Python is also portable to Java and ....