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| author | Jon Dufresne <jon.dufresne@gmail.com> | 2019-10-31 21:10:28 -0700 |
|---|---|---|
| committer | Paul McGuire <ptmcg@users.noreply.github.com> | 2019-10-31 23:10:28 -0500 |
| commit | 53d1b4a6f48a53c4c4ec4ac7031362b691c0366d (patch) | |
| tree | 088ad3cf3561b78a00af4fb2fd474f4a2b8ca70c /examples/simpleArith.py | |
| parent | 41752aa52cc97c710474bb2972cceab057b52ad4 (diff) | |
| download | pyparsing-git-53d1b4a6f48a53c4c4ec4ac7031362b691c0366d.tar.gz | |
Blacken the project (#141)
Diffstat (limited to 'examples/simpleArith.py')
| -rw-r--r-- | examples/simpleArith.py | 53 |
1 files changed, 29 insertions, 24 deletions
diff --git a/examples/simpleArith.py b/examples/simpleArith.py index af05373..af3f904 100644 --- a/examples/simpleArith.py +++ b/examples/simpleArith.py @@ -9,15 +9,15 @@ from pyparsing import *
-integer = Word(nums).setParseAction(lambda t:int(t[0]))
-variable = Word(alphas,exact=1)
+integer = Word(nums).setParseAction(lambda t: int(t[0]))
+variable = Word(alphas, exact=1)
operand = integer | variable
-expop = Literal('^')
-signop = oneOf('+ -')
-multop = oneOf('* /')
-plusop = oneOf('+ -')
-factop = Literal('!')
+expop = Literal("^")
+signop = oneOf("+ -")
+multop = oneOf("* /")
+plusop = oneOf("+ -")
+factop = Literal("!")
# To use the infixNotation helper:
# 1. Define the "atom" operand term of the grammar.
@@ -43,24 +43,29 @@ factop = Literal('!') # this expression to parse input strings, or incorporate it
# into a larger, more complex grammar.
#
-expr = infixNotation( operand,
- [("!", 1, opAssoc.LEFT),
- ("^", 2, opAssoc.RIGHT),
- (signop, 1, opAssoc.RIGHT),
- (multop, 2, opAssoc.LEFT),
- (plusop, 2, opAssoc.LEFT),]
- )
+expr = infixNotation(
+ operand,
+ [
+ ("!", 1, opAssoc.LEFT),
+ ("^", 2, opAssoc.RIGHT),
+ (signop, 1, opAssoc.RIGHT),
+ (multop, 2, opAssoc.LEFT),
+ (plusop, 2, opAssoc.LEFT),
+ ],
+)
-test = ["9 + 2 + 3",
- "9 + 2 * 3",
- "(9 + 2) * 3",
- "(9 + -2) * 3",
- "(9 + -2) * 3^2^2",
- "(9! + -2) * 3^2^2",
- "M*X + B",
- "M*(X + B)",
- "1+2*-3^4*5+-+-6",]
+test = [
+ "9 + 2 + 3",
+ "9 + 2 * 3",
+ "(9 + 2) * 3",
+ "(9 + -2) * 3",
+ "(9 + -2) * 3^2^2",
+ "(9! + -2) * 3^2^2",
+ "M*X + B",
+ "M*(X + B)",
+ "1+2*-3^4*5+-+-6",
+]
for t in test:
print(t)
print(expr.parseString(t))
- print('')
+ print("")
|