datetime

问题 I am looking to convert datetime to date for a pandas datetime series. I have listed the code below: df = pd.DataFrame() df = pandas.io.parsers.read_csv("TestData.csv", low_memory=False) df['PUDATE'] = pd.Series([pd.to_datetime(date) for date in df['DATE_TIME']]) df['PUDATE2'] = datetime.datetime.date(df['PUDATE']) #Does not work Can anyone guide me in right direction? 回答1: You can access the datetime methods of a Pandas series by using the .dt methods (in a aimilar way to how you would

问题 I am looking to convert datetime to date for a pandas datetime series. I have listed the code below: df = pd.DataFrame() df = pandas.io.parsers.read_csv("TestData.csv", low_memory=False) df['PUDATE'] = pd.Series([pd.to_datetime(date) for date in df['DATE_TIME']]) df['PUDATE2'] = datetime.datetime.date(df['PUDATE']) #Does not work Can anyone guide me in right direction? 回答1: You can access the datetime methods of a Pandas series by using the .dt methods (in a aimilar way to how you would

问题 This question already has answers here : How to validate the DateTime string format “2018-01-22T18:23:00.000Z” in Java? (2 answers) Closed 7 months ago . How to parse "2020-05-22T12:51:20.732111Z" to Instant in Java? I used: LocalDateTime.parse( startTime, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US)) .atZone(ZoneId.of("America/Toronto")) .toInstant() but with error: Exception in thread "main" java.time.format.DateTimeParseException: Text '2020-05-22T12:51:20.732111Z

问题 This question already has answers here : How to validate the DateTime string format “2018-01-22T18:23:00.000Z” in Java? (2 answers) Closed 7 months ago . How to parse "2020-05-22T12:51:20.732111Z" to Instant in Java? I used: LocalDateTime.parse( startTime, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US)) .atZone(ZoneId.of("America/Toronto")) .toInstant() but with error: Exception in thread "main" java.time.format.DateTimeParseException: Text '2020-05-22T12:51:20.732111Z

问题 I have the following string that I need to parse string date = "2017-06-23T13:45:45.816" What is correct format string? I tried DateTime createDate = DateTime.ParseExact(date, "yyyy-MM-dd'T'hh-mm-ss", CultureInfo.InvariantCulture); 回答1: yyyy-MM-dd'T'hh-mm-ss is not 2017-06-23T13:45:45.816 you have missing milliseconds, 12 hour clock and also wrong separators. You'd probably need something like: "yyyy-MM-dd'T'HH:mm:ss.fff" Remember it's ParseExact . 回答2: That seems an RFC 3339 date to me, so

问题 I have the following string that I need to parse string date = "2017-06-23T13:45:45.816" What is correct format string? I tried DateTime createDate = DateTime.ParseExact(date, "yyyy-MM-dd'T'hh-mm-ss", CultureInfo.InvariantCulture); 回答1: yyyy-MM-dd'T'hh-mm-ss is not 2017-06-23T13:45:45.816 you have missing milliseconds, 12 hour clock and also wrong separators. You'd probably need something like: "yyyy-MM-dd'T'HH:mm:ss.fff" Remember it's ParseExact . 回答2: That seems an RFC 3339 date to me, so

问题 How can I print the date of the last Tuesday of each month for next year using Python. For example the first line outputted would be: 30/Jan/2018 I do not want to have the full name of the month only the first 3 characters! Currently I have figured out how to get the next year: import datetime now = datetime.datetime.now() next_year = now.year + 1 Can anyone please help? 回答1: The calendar module is perfect for this: You can use calendar.month_abbr which is an array of abbreviated months just

问题 i have a datetime pandas.Series . One column called "dates". I want to get 'i' element in loop like string. s.apply(lambda x: x.strftime('%Y.%m.%d')) or astype(str).tail(1).reset_index()['date'] or many other solutions don't work. I just want a string like '2016-09-16' (first datetime element in series) and not what is currently returned, which is: ss = series_of_dates.astype(str).tail(1).reset_index()['date'] "lol = %s" % ss lol = 0 2016-09-16\nName: date, dtype: object I need just: lol =

问题 Manipulating Dates causing me some issues. I've created some Java code that reads a document from a Notes DB then populates some fields in a Java Object with values from the Notes Document. The Notes Document contains a DataTime field "ExpPayDate" and I want to store it in the Java Object, but get a syntax error in the Java Editor. My code looks like this: for (int n = 1 ; n < col.getCount(); n++){ Document pDoc = col.getNthDocument(n); PaymentItem pItem = new PaymentItem(); Date pDate = pDoc

问题 Manipulating Dates causing me some issues. I've created some Java code that reads a document from a Notes DB then populates some fields in a Java Object with values from the Notes Document. The Notes Document contains a DataTime field "ExpPayDate" and I want to store it in the Java Object, but get a syntax error in the Java Editor. My code looks like this: for (int n = 1 ; n < col.getCount(); n++){ Document pDoc = col.getNthDocument(n); PaymentItem pItem = new PaymentItem(); Date pDate = pDoc