| avatar = models.ImageField( | |
| upload_to=user_avatar_path, | |
| null=True, | |
| blank=True, | |
| default=None, | |
| validators=[ | |
| FileExtensionValidator(allowed_extensions=["jpg", "jpeg", "png"]), | |
| validate_image_file, # Reusable image validation | |
| ], | |
| ) |
Python automatycznie rozpakowuje *args i **kwargs do odpowiednich pozycji w sygnaturze funkcji. Jeśli po tym rozpakowaniu okaże się, że funkcja nie ma odpowiednich parametrów, wtedy zostanie zgłoszony błąd TypeError. Przyjrzyjmy się temu bliżej.
Rozpakowywanie *args
*args pozwala funkcji przyjmować dowolną liczbę argumentów pozycyjnych. Te argumenty są przekazywane jako krotka.
def example_func(a, b, *args):
| class Pojazd: | |
| def __init__(self, predkosc: int, kolor: str) -> None: | |
| self.predkosc: int = predkosc | |
| self.kolor: str = kolor | |
| def jedz(self) -> None: | |
| print("Pojazd jedzie.") | |
| def zatrzymaj(self) -> None: | |
| print("Pojazd zatrzymuje się.") |
| def test_model_form_contact_fields(): | |
| form = ModelContactForm() | |
| assert len(form.fields) == 4 | |
| assert "email" in form.fields | |
| assert "first_name" in form.fields | |
| assert "last_name" in form.fields | |
| assert "message" in form.fields |
| def compare(a, b): | |
| if a == b: | |
| return True | |
| else: | |
| return False |
| """ | |
| Generate zone records file (terraform) from zone dump. | |
| To get zone dump: | |
| aws route53 list-resource-record-sets --hosted-zone-id ZONE ID > records.json | |
| Example usage: | |
| ZONE_FILE=records.json TERRAFORM_DIR=zone_name python generate_zone_records_from_json.py | |
| Based on: | |
| https://mrkaran.dev/posts/terraform-route53-import/ |
| import { Context } from "aws-lambda"; | |
| const context: Context = { | |
| callbackWaitsForEmptyEventLoop: false, | |
| functionName: "", | |
| functionVersion: "string", | |
| invokedFunctionArn: "string", | |
| memoryLimitInMB: 1, | |
| awsRequestId: "string", | |
| logGroupName: "string", |
| # error handling | |
| # redirect logs so can be found in instance -> actions -> instance settings -> Get System log | |
| exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1 | |
| # trap errors. Shutdown restarts machine in an hour and prevents further commands, | |
| # so instances won't finish booting and won't report to ECS | |
| function my_trap() | |
| { | |
| echo "Sorry, there was an error at line $1 $2" && shutdown -h +60 | |
| } | |
| trap 'my_trap $${LINENO} $$? ' ERR |
| # use filter, Luke | |
| # the idea is to use a filter function that will return True for the records to keep. | |
| # Usage: just use before the last function at end of your ETL job script. Update frame and update next function frame with "filtered". | |
| def filter_function(dynamicRecord): | |
| if dynamicRecord.merchant_id == "merchant_id" and dynamicRecord.merchant_ref_number == "merchant_ref_number": | |
| return False | |
| else: | |
| return True | |
| filtered = Filter.apply(frame = dropnullfields3, f = filter_function, transformation_ctx = "filtered") |
| // inspired by: https://derikwhittaker.blog/2018/02/20/using-manual-mocks-to-test-the-aws-sdk-with-jest/ | |
| let AWS = { | |
| // This here is to allow/prevent runtime errors if you are using | |
| // AWS.config to do some runtime configuration of the library. | |
| // If you do not need any runtime configuration you can omit this. | |
| config: { | |
| setPromisesDependency: (arg) => {}, | |
| update: (arg) => {}, | |
| }, |