Add repr_mapping_line (#682)

src/coola/utils/format.py

@@ -7,6 +7,7 @@
     "find_best_byte_unit",
     "repr_indent",
     "repr_mapping",
+    "repr_mapping_line",
     "repr_sequence",
     "str_human_byte_size",
     "str_indent",
@@ -100,6 +101,37 @@ def repr_mapping(mapping: Mapping, sorted_keys: bool = False, num_spaces: int =
     return "\n".join(lines)
 
 
+def repr_mapping_line(mapping: Mapping, sorted_keys: bool = False, separator: str = ", ") -> str:
+    r"""Compute a single line string representation of the given mapping.
+
+    This function is designed for flat dictionary. If you have a
+    nested dictionary, you may consider other functions. Note that
+    this function works for nested dict but the output may not be
+    nice.
+
+    Args:
+        mapping: The mapping.
+        sorted_keys: If ``True``, the keys in the mapping are sorted
+            before to compute the string representation.
+        separator: The separator to use between each key-value pair.
+
+    Returns:
+        The string representation of the mapping.
+
+    Example usage:
+
+    ```pycon
+
+    >>> from coola.utils.format import repr_mapping_line
+    >>> repr_mapping_line({"key1": "abc", "key2": "meow", "key3": 42})
+    key1='abc', key2='meow', key3=42
+
+    ```
+    """
+    mapping = sorted(mapping.items()) if sorted_keys else mapping.items()
+    return separator.join(f"{key}={value!r}" for key, value in mapping)
+
+
 def repr_sequence(sequence: Sequence, num_spaces: int = 2) -> str:
     r"""Compute a string representation of a sequence.
 

tests/unit/utils/test_format.py

@@ -6,6 +6,7 @@
     find_best_byte_unit,
     repr_indent,
     repr_mapping,
+    repr_mapping_line,
     repr_sequence,
     str_human_byte_size,
     str_indent,
@@ -77,6 +78,34 @@ def test_repr_mapping_sorted_keys_false() -> None:
     assert repr_mapping({"key2": "value2", "key1": "value1"}) == "(key2): value2\n(key1): value1"
 
 
+#######################################
+#     Tests for repr_mapping_line     #
+#######################################
+
+
+def test_repr_mapping_line_empty() -> None:
+    assert repr_mapping_line({}) == ""
+
+
+def test_repr_mapping_line_1_item() -> None:
+    assert repr_mapping_line({"key": "value"}) == "key='value'"
+
+
+def test_repr_mapping_line_2_items() -> None:
+    assert repr_mapping_line({"key1": "value1", "key2": "value2"}) == "key1='value1', key2='value2'"
+
+
+def test_repr_mapping_line_sorted_keys_true() -> None:
+    assert (
+        repr_mapping_line({"key2": "value2", "key1": "value1"}, sorted_keys=True)
+        == "key1='value1', key2='value2'"
+    )
+
+
+def test_repr_mapping_line_sorted_keys_false() -> None:
+    assert repr_mapping_line({"key2": "value2", "key1": "value1"}) == "key2='value2', key1='value1'"
+
+
 ###################################
 #     Tests for repr_sequence     #
 ###################################