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def write_csv_from_queryset(queryset, fields, output=None):
    """
    >>> from django.contrib.auth.models import User
    >>> qs = User.objects.all()[:5]
    >>> write_csv_from_queryset(qs, 'username')
    >>> write_csv_from_queryset(qs, ['username', 'is_superuser'])
    """
    import csv
    import datetime

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import csv
from io import TextIOWrapper
from collections import namedtuple


class InvalidCSVFileException(Exception):
    pass


class MissingCSVHeadersException(Exception):

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import csv
import datetime
import logging
from pathlib import Path

logger = logging.getLogger(__name__)


def write_csv_from_queryset(queryset, fields, output=None):
    output_filename = Path(str(output) if isinstance(output, (Path, str)) else f'{queryset.model._meta.model_name}_{datetime.datetime.now():%Y-%m-%d__%H_%M_%S}.csv')

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from django.contrib.auth.models import AbstractUser
from django.db.models import CharField, Field, Model
from django.urls import reverse
from django.utils.translation import gettext_lazy as _


class AliasField(Field):
    # based on https://djangosnippets.org/snippets/10440/
    def __init__(self, alias_from, editable=True):

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from pycallgraph import PyCallGraph
from pycallgraph import Config
from pycallgraph import GlobbingFilter
from pycallgraph.output import GraphvizOutput


class ProfilerMiddleware(object):
    includes = []

    def can(self, request):

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.DEFAULT_GOAL := help

define PRINT_HELP_PYSCRIPT
import re, sys

output = []
for line in sys.stdin:
	match = re.match(r'^([a-zA-Z_-]+):.*?## (.*)$$', line)
	if match:
		target, help = match.groups()

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brew install imagemagick
convert image.png output.pdf

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import io
from django.core.mail import EmailMessage
from wkhtmltopdf.views import PDFTemplateView


class MyPDFTemplateView(PDFTemplateView):
    def render_to_response(self, context, **response_kwargs):
        response_instance = super(MyPDFTemplateView, self).render_to_response(context, **response_kwargs)
        pdf_content = io.BytesIO(response_instance.rendered_content)
        pdf_content.seek(0)

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Step 7/10 : RUN echo -e "\n\nInstalling Bookdown...\n\n"     && Rscript -e "install.packages('bookdown', repository='http://mirror.utexas.edu/ctan/')"     && echo -e "\n\nInstalling Tinytex...\n\n"     && Rscript -e "install.packages('tinytex', repository='http://mirror.utexas.edu/ctan/')"     && echo -e "\n\nInstalling Latex packages via Tinytex...\n\n"     && Rscript -e "tinytex::install_tinytex(repository='http://mirror.utexas.edu/ctan/', extra_packages=c('luahbtex', 'lm-math', 'unicode-math'))"     && echo -e "\n\nReinstalling Latex packages via Tinytex...\n\n"     && Rscript -e "tinytex::reinstall_tinytex()"
 ---> Running in 06a01042e395
-e

Installing Bookdown...


Installing package into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
also installing the dependencies ‘glue’, ‘magrittr’, ‘stringi’, ‘digest’, ‘Rcpp’, ‘rlang’, ‘evaluate’, ‘highr’, ‘markdown’, ‘stringr’, ‘yaml’, ‘base64enc’, ‘jsonlite’, ‘mime’, ‘htmltools’, ‘knitr’, ‘rmarkdown’, ‘xfun’, ‘tinytex’

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The install command:

RUN Rscript -e "install.packages('bookdown', repository='http://mirror.utexas.edu/ctan/')" \
    && Rscript -e "install.packages('tinytex', repository='http://mirror.utexas.edu/ctan/')" \
    && Rscript -e "tinytex::install_tinytex(repository='http://mirror.utexas.edu/ctan/')" \
    && Rscript -e "tinytex::tlmgr_install(c('lm-math', 'unicode-math'))"