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venv/Lib/site-packages/django/utils/numberformat.py

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+from decimal import Decimal
+
+from django.conf import settings
+from django.utils.safestring import mark_safe
+
+
+def format(number, decimal_sep, decimal_pos=None, grouping=0, thousand_sep='',
+           force_grouping=False, use_l10n=None):
+    """
+    Get a number (as a number or string), and return it as a string,
+    using formats defined as arguments:
+
+    * decimal_sep: Decimal separator symbol (for example ".")
+    * decimal_pos: Number of decimal positions
+    * grouping: Number of digits in every group limited by thousand separator.
+        For non-uniform digit grouping, it can be a sequence with the number
+        of digit group sizes following the format used by the Python locale
+        module in locale.localeconv() LC_NUMERIC grouping (e.g. (3, 2, 0)).
+    * thousand_sep: Thousand separator symbol (for example ",")
+    """
+    use_grouping = (use_l10n or (use_l10n is None and settings.USE_L10N)) and settings.USE_THOUSAND_SEPARATOR
+    use_grouping = use_grouping or force_grouping
+    use_grouping = use_grouping and grouping != 0
+    # Make the common case fast
+    if isinstance(number, int) and not use_grouping and not decimal_pos:
+        return mark_safe(number)
+    # sign
+    sign = ''
+    # Treat potentially very large/small floats as Decimals.
+    if isinstance(number, float) and 'e' in str(number).lower():
+        number = Decimal(str(number))
+    if isinstance(number, Decimal):
+
+        if decimal_pos is not None:
+            # If the provided number is too small to affect any of the visible
+            # decimal places, consider it equal to '0'.
+            cutoff = Decimal('0.' + '1'.rjust(decimal_pos, '0'))
+            if abs(number) < cutoff:
+                number = Decimal('0')
+
+        # Format values with more than 200 digits (an arbitrary cutoff) using
+        # scientific notation to avoid high memory usage in {:f}'.format().
+        _, digits, exponent = number.as_tuple()
+        if abs(exponent) + len(digits) > 200:
+            number = '{:e}'.format(number)
+            coefficient, exponent = number.split('e')
+            # Format the coefficient.
+            coefficient = format(
+                coefficient, decimal_sep, decimal_pos, grouping,
+                thousand_sep, force_grouping, use_l10n,
+            )
+            return '{}e{}'.format(coefficient, exponent)
+        else:
+            str_number = '{:f}'.format(number)
+    else:
+        str_number = str(number)
+    if str_number[0] == '-':
+        sign = '-'
+        str_number = str_number[1:]
+    # decimal part
+    if '.' in str_number:
+        int_part, dec_part = str_number.split('.')
+        if decimal_pos is not None:
+            dec_part = dec_part[:decimal_pos]
+    else:
+        int_part, dec_part = str_number, ''
+    if decimal_pos is not None:
+        dec_part = dec_part + ('0' * (decimal_pos - len(dec_part)))
+    dec_part = dec_part and decimal_sep + dec_part
+    # grouping
+    if use_grouping:
+        try:
+            # if grouping is a sequence
+            intervals = list(grouping)
+        except TypeError:
+            # grouping is a single value
+            intervals = [grouping, 0]
+        active_interval = intervals.pop(0)
+        int_part_gd = ''
+        cnt = 0
+        for digit in int_part[::-1]:
+            if cnt and cnt == active_interval:
+                if intervals:
+                    active_interval = intervals.pop(0) or active_interval
+                int_part_gd += thousand_sep[::-1]
+                cnt = 0
+            int_part_gd += digit
+            cnt += 1
+        int_part = int_part_gd[::-1]
+    return sign + int_part + dec_part