探索Django utils

from django.utils.crypto import get_random_string

get_random_string()

'5QxAxqyhsyJM'

get_random_string(50)

'lrWYnyxhnXpwmjHDzmdgTFaIi1j73cKD5fPDOPwuVBmmKxITYF'

get_random_string(12, '0123456789')

'805379737758'

from django.utils.dates import WEEKDAYS

WEEKDAYS = {
    0: _('Monday'), 1: _('Tuesday'), 2: _('Wednesday'), 3: _('Thursday'), 4: _('Friday'),
    5: _('Saturday'), 6: _('Sunday')
}

from django.utils.dates import WEEKDAYS_ABBR

WEEKDAYS_ABBR = {
    0: _('Mon'), 1: _('Tue'), 2: _('Wed'), 3: _('Thu'), 4: _('Fri'),
    5: _('Sat'), 6: _('Sun')
}

from django.utils.dates import MONTHS

MONTHS = {
    1: _('January'), 2: _('February'), 3: _('March'), 4: _('April'), 5: _('May'), 6: _('June'),
    7: _('July'), 8: _('August'), 9: _('September'), 10: _('October'), 11: _('November'),
    12: _('December')
}

from django.utils.dateformat import format
from django.utils import timezone

now = timezone.now()    # datetime.datetime(2018, 11, 16, 6, 48, 41, 351928, tzinfo=<UTC>)
format(now, 'd M Y')

u'16 Nov 2018'

format(now, 'd/m/Y H:i')

u'16/11/2018 06:48'

from django.utils.dateparse import parse_date

parse_date('2018-11-16')

datetime.date(2018, 11, 16)

from django.utils.dateparse import parse_time

parse_time('14:54:02')

datetime.time(14, 54, 2)

from django.utils.dateparse import parse_datetime

parse_datetime('2018-11-16 14:54:02')

datetime.datetime(2018, 11, 16, 14, 54, 2)

from django.utils.html import urlize

urlize('You guys should visit this website www.google.com')
print urlize('Please visit:  https://jackeygao.io')

'You guys should visit this website <a href="http://www.google.com">www.google.com</a>'
Please visit:  <a href="https://jackeygao.io">https://jackeygao.io</a>

urlize('Send me a message to [email protected]')

'Send me a message to <a href="mailto:[email protected]">[email protected]</a>'

urlize('Please visit https://jackeygao.io/words/django-exploring-utils.html', 24)

Please visit <a href="https://jackeygao.io/words/django-exploring-utils.html">https://jackeygao.io/...</a>

from django.utils.html import escape

escape("<strong style='font-size: 12px'>escaped html</strong>")

'<strong style='font-size: 12px'>escaped html</strong>'

escaped_html = escape("<strong>escaped html</strong>")
# '&lt;strong&gt;escaped html&lt;/strong&gt;'

escape(escaped_html)
# '&amp;lt;strong&amp;gt;escaped html&amp;lt;/strong&amp;gt;'

escaped_html = conditional_escape("<strong>escaped html</strong>")
# '&lt;strong&gt;escaped html&lt;/strong&gt;'

conditional_escape(escaped_html)
# '&lt;strong&gt;escaped html&lt;/strong&gt;'

from django.utils.html import format_html

format_html('<div class="alert {}">{}</>', 'warning', 'Watch out!')

'<div class="alert warning">Watch out!</>'

format_html('<div class="alert {}">{}</>', '<script>alert(1);</script>', 'Watch out!')

'<div class="alert &lt;script&gt;alert(1);&lt;/script&gt;">Watch out!</>'

format_html_join('\n', '<p>{}</p>', ['a', 'b', 'c'])

<p>a</p>\n<p>b</p>\n<p>c</p>

data = [
    ['success', 'Success message'],
    ['warning', 'Watch out!'],
    ['danger', 'Danger!!'],
]

format_html_join('\n', '<div class="alert {0}">{1}</div>', data)

<div class="alert success">Success message</div>\n
<div class="alert warning">Watch out!</div>\n
<div class="alert danger">Danger!!</div>

format_html_join('\n', '<tr><td>{0}</td><td>{1}</td></tr>', ((u.first_name, u.last_name)
                                                            for u in users))

<tr><td>Vitor</td><td>Freitas</td></tr>\n
<tr><td>John</td><td>Duo</td></tr>\n
<tr><td>Peter</td><td>Croke</td></tr>\n
<tr><td>Elektra</td><td>Moore</td></tr>

from django.utils.html import linebreaks

linebreaks('convert\ninto html paragraphs\ntest')

<p>convert<br />into html paragraphs<br />test</p>