Merge pull request RustPython#4403 from yt2b/fix_exponential_format

Fix exponential format

Author: youknowone

common/src/format.rs

@@ -513,13 +513,9 @@ impl FormatSpec {
                     Some(_) | None => Err("%c arg not in range(0x110000)"),
                 },
             },
-            Some(FormatType::GeneralFormatUpper) => {
-                Err("Unknown format code 'G' for object of type 'int'")
-            }
-            Some(FormatType::GeneralFormatLower) => {
-                Err("Unknown format code 'g' for object of type 'int'")
-            }
-            Some(FormatType::FixedPointUpper)
+            Some(FormatType::GeneralFormatUpper)
+            | Some(FormatType::GeneralFormatLower)
+            | Some(FormatType::FixedPointUpper)
             | Some(FormatType::FixedPointLower)
             | Some(FormatType::ExponentUpper)
             | Some(FormatType::ExponentLower)

extra_tests/snippets/builtin_format.py

@@ -64,3 +64,5 @@ def test_zero_padding():
 assert f"{123.456:010,}" == "00,123.456"
 assert f"{123.456:011,}" == "000,123.456"
 assert f"{123.456:+011,}" == "+00,123.456"
+assert f"{1234:.3g}" == "1.23e+03"
+assert f"{1234567:.6G}" == "1.23457E+06"