RustPython · windelbouwman · Dec 29, 2018 · Dec 20, 2018
diff --git a/tests/snippets/test_string.py b/tests/snippets/test_string.py
@@ -0,0 +1,13 @@
+import string
+
+
+assert string.ascii_letters == 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
+assert string.ascii_lowercase == 'abcdefghijklmnopqrstuvwxyz'
+assert string.ascii_uppercase == 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+assert string.digits == '0123456789'
+assert string.hexdigits == '0123456789abcdefABCDEF'
+assert string.octdigits == '01234567'
+assert string.punctuation == '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'
+# FIXME
+#assert string.whitespace == ' \t\n\r\x0b\x0c', string.whitespace
+#assert string.printable == '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c'
diff --git a/vm/src/stdlib/mod.rs b/vm/src/stdlib/mod.rs
@@ -6,6 +6,7 @@ mod math;
 mod pystruct;
 mod random;
 mod re;
+mod string;
 mod time_module;
 mod tokenize;
 mod types;
@@ -25,6 +26,7 @@ pub fn get_module_inits() -> HashMap<String, StdlibInitFunc> {
     modules.insert("math".to_string(), math::mk_module as StdlibInitFunc);
     modules.insert("re".to_string(), re::mk_module as StdlibInitFunc);
     modules.insert("random".to_string(), random::mk_module as StdlibInitFunc);
+    modules.insert("string".to_string(), string::mk_module as StdlibInitFunc);
     modules.insert("struct".to_string(), pystruct::mk_module as StdlibInitFunc);
     modules.insert("time".to_string(), time_module::mk_module as StdlibInitFunc);
     modules.insert(

diff --git a/vm/src/stdlib/string.rs b/vm/src/stdlib/string.rs
@@ -0,0 +1,43 @@
+/* String builtin module
+ *
+ *
+ */
+
+use super::super::pyobject::{PyContext, PyObjectRef};
+
+pub fn mk_module(ctx: &PyContext) -> PyObjectRef {
+    let py_mod = ctx.new_module(&"string".to_string(), ctx.new_scope(None));
+
+    let ascii_lowercase = "abcdefghijklmnopqrstuvwxyz".to_string();
+    let ascii_uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".to_string();
+    let ascii_letters = format!("{}{}", ascii_lowercase, ascii_uppercase);
+    let digits = "0123456789".to_string();
+    let hexdigits = "0123456789abcdefABCDEF".to_string();
+    let octdigits = "01234567".to_string();
+    let punctuation = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~".to_string();
+    /* FIXME
+    let whitespace = " \t\n\r\x0b\x0c".to_string();
+    let printable = format!("{}{}{}{}", digits, ascii_letters, punctuation, whitespace);
+    */
+
+    // Constants:
+    ctx.set_attr(&py_mod, "ascii_letters", ctx.new_str(ascii_letters.clone()));
+    ctx.set_attr(
+        &py_mod,
+        "ascii_lowercase",
+        ctx.new_str(ascii_lowercase.clone()),
+    );
+    ctx.set_attr(
+        &py_mod,
+        "ascii_uppercase",
+        ctx.new_str(ascii_uppercase.clone()),
+    );
+    ctx.set_attr(&py_mod, "digits", ctx.new_str(digits.clone()));
+    ctx.set_attr(&py_mod, "hexdigits", ctx.new_str(hexdigits.clone()));
+    ctx.set_attr(&py_mod, "octdigits", ctx.new_str(octdigits.clone()));
+    // ctx.set_attr(&py_mod, "printable", ctx.new_str(printable.clone()));
+    ctx.set_attr(&py_mod, "punctuation", ctx.new_str(punctuation.clone()));
+    // ctx.set_attr(&py_mod, "whitespace", ctx.new_str(whitespace.clone()));
+
+    py_mod
+}