pyawscron-pitchblack408 1.0.0
An AWS Cron Parser
Requires Python: >=3.6

# pyawscron

A python port from a typescript project.
https://github.com/beemhq/aws-cron-parser

# Work in progess
Need to implement the prev method in occurance.py 

## [AWS Cron Expressions](https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.html#CronExpressions)
### cron(fields)
<table>
   <thead>
      <tr>
         <th><b>Field</b></th>
         <th><b>Values</b></th>
         <th><b>Wildcards</b></th>
      </tr>
   </thead>
   <tbody>
      <tr>
         <td>
            <p>Minutes</p>
         </td>
         <td>
            <p>0-59</p>
         </td>
         <td>
            <p>, - * /</p>
         </td>
      </tr>
      <tr>
         <td>
            <p>Hours</p>
         </td>
         <td>
            <p>0-23</p>
         </td>
         <td>
            <p>, - * /</p>
         </td>
      </tr>
      <tr>
         <td>
            <p>Day-of-month</p>
         </td>
         <td>
            <p>1-31</p>
         </td>
         <td>
            <p>, - * ? / L W</p>
         </td>
      </tr>
      <tr>
         <td>
            <p>Month</p>
         </td>
         <td>
            <p>1-12 or JAN-DEC</p>
         </td>
         <td>
            <p>, - * /</p>
         </td>
      </tr>
      <tr>
         <td>
            <p>Day-of-week</p>
         </td>
         <td>
            <p>1-7 or SUN-SAT</p>
         </td>
         <td>
            <p>, - * ? L #</p>
         </td>
      </tr>
      <tr>
         <td>
            <p>Year</p>
         </td>
         <td>
            <p>1970-2199</p>
         </td>
         <td>
            <p>, - * /</p>
         </td>
      </tr>
   </tbody>
</table>

### Wildcards
* The , (comma) wildcard includes additional values. In the Month field, JAN,FEB,MAR would include January, February, and March.
* The - (dash) wildcard specifies ranges. In the Day field, 1-15 would include days 1 through 15 of the specified month.
* The * (asterisk) wildcard includes all values in the field. In the Hours field, * would include every hour. You cannot use * in both the Day-of-month and Day-of-week fields. If you use it in one, you must use ? in the other.
* The / (forward slash) wildcard specifies increments. In the Minutes field, you could enter 1/10 to specify every tenth minute, starting from the first minute of the hour (for example, the 11th, 21st, and 31st minute, and so on).
* The ? (question mark) wildcard specifies one or another. In the Day-of-month field you could enter 7 and if you didn't care what day of the week the 7th was, you could enter ? in the Day-of-week field.
* The L wildcard in the Day-of-month or Day-of-week fields specifies the last day of the month or week.
* The W wildcard in the Day-of-month field specifies a weekday. In the Day-of-month field, 3W specifies the weekday closest to the third day of the month.
* The # wildcard in the Day-of-week field specifies a certain instance of the specified day of the week within a month. For example, 3#2 would be the second Tuesday of the month: the 3 refers to Tuesday because it is the third day of each week, and the 2 refers to the second day of that type within the month.



## Methods Implemented:

    cron_str = '23,24,25 17,18 25 MAR/4 ? 2020,2021,2023,2028'
    cron = AWSCron(cron_str)
    dt = datetime.datetime(2020, 5, 9, 22, 30, 57, tzinfo=datetime.timezone.utc)
    dt = cron.occurance(dt).next()
 
 Result
 
    '2020-07-25 17:23:00+00:00',