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Conditionals on replacement in a string


Conditionals on replacement in a string

By : ffz
Date : November 21 2020, 07:35 AM
I wish did fix the issue. You could compile a few sets of regular expressions, then pass your list of input through them. Something like: import re
code :
countries = ['foo', 'bar', 'baz']
takes = [re.compile(r'of\s+(the)?\s*%s$' % (c), re.I) for c in countries]
subs = [re.compile(r'%s$' % (c), re.I) for c in countries]

def remove_country(s):
    for regex in takes:
        if regex.search(s):
            return s
    for regex in subs:
        s = regex.sub('', s)
    return s

print remove_country('the bank of foo')
print remove_country('the bank of the baz')
print remove_country('the nation bar')

''' Output:
    the bank of foo
    the bank of the baz
    the nation
'''


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Python conditionals replacement with polymorphism

Python conditionals replacement with polymorphism


By : Flashmind
Date : March 29 2020, 07:55 AM
To fix the issue you can do The point is that you would generally have created only one logger object at some earlier point in your program. So then you would just do log_msg(myLogger), and it would automatically do the right thing, whether you had originally decided to use file-based or db-based logging.
In other words, your code would look like this
code :
# beginning of file
from logmodule import FileLogger, DBLogger, log_msg
myLogger = FileLogger()

# lots of other code here. . .
# later if you want to log something:

log_msg(myLogger)
Regex: Performing string replacement with same pattern but with different replacement words

Regex: Performing string replacement with same pattern but with different replacement words


By : Ravi
Date : March 29 2020, 07:55 AM
wish helps you If I understood correctly, you want to replace certain words by others.
I'd suggest you to put all of the words and their replacement in the same Map and run the following :
code :
public static String replaceWords(String text, Map<String,String> replacement) {
    String temp = text;

    for(Entry<String,String> entry : replacement.entrySet()){
        temp = temp.replace(entry.getKey(), entry.getValue());
    }

    return temp;
}
public static void performRegexReplacement() {
    // Construct a test mapper/dictionary
    List<Map<String, String>> dictionnary = Arrays.asList(Collections.singletonMap("TRSS190E", "TRST0822"), Collections.singletonMap("TRSP1143", "TRSP6644"), Collections.singletonMap("TRSM0146", "TRSM1273"));

    // Perform replacement
    String corpus = "Hey there! I think TRSS190E is a very important parameter for the rover. " +
            "Because the Martian atmosphere also requires TRSP1143 and TRSM0146 for it's " +
            "platform and mobility subsystems.";

    String expectedCorpus = "Hey there! I think TRST0822 is a very important parameter for the rover. " +
            "Because the Martian atmosphere also requires TRSP6644 and TRSM1273 for it's " +
            "platform and mobility subsystems.";

    String updatedCorpus = corpus;
    for(Map<String,String> replacement : dictionnary){
        updatedCorpus = replaceWords(updatedCorpus, replacement);
    }

    System.out.println(updatedCorpus);

    if(expectedCorpus.equals(updatedCorpus)){
        System.out.println("yay");
    } else {
        System.out.println("no");
    }
}
Using if-then-else conditionals with Python regex replacement

Using if-then-else conditionals with Python regex replacement


By : Adithya Selvi N
Date : March 29 2020, 07:55 AM
around this issue You may pass the match to a method where you may check if a certain group matched or not, and then build the replacement dynamically applying your conditions using standard Python means:
code :
import re
def repl(x):
    return r"\frac{{{0}}}{{{1} - {2}}}".format(x.group("numer"),
        (x.group("denom1") if x.group("neg") else x.group("denom2")),
        (x.group("denom2") if x.group("neg") else x.group("denom1")))

string1 = r"- \frac{2}{- 4 \sqrt{2} + 2}"
string2 = r"\frac{2}{- 4 \sqrt{2} + 2}"
pattern = r"(?P<neg>- )?\\frac{(?P<numer>\d*)}{- (?P<denom1>\d* ?\\sqrt{\d*}) \+ (?P<denom2>\d*)\}"
print(re.sub(pattern, repl, string1)) # => \frac{2}{4 \sqrt{2} - 2}
print(re.sub(pattern, repl, string2)) # => \frac{2}{2 - 4 \sqrt{2}}
When should you use python flask conditionals vs jinja2 html template conditionals?

When should you use python flask conditionals vs jinja2 html template conditionals?


By : nagpal meenakshi
Date : March 29 2020, 07:55 AM
I wish did fix the issue. This is somewhat of a question of philosophy, and as such borders on "Opinion-based," however I feel like there's a good treatise in here somewhere about separation of business logic from data.
Templates should contain data. That data might not be static, which is when you would use template conditionals. Your page might want to look different if it's being accessed by an unauthenticated user, or your page might want to allow the user to change date formats or etc.
How do I perform multiple string replacement with replacement clashes?

How do I perform multiple string replacement with replacement clashes?


By : CSK_IT
Date : September 25 2020, 04:00 PM
help you fix your problem I have a list of string replacements. Each replacement is trivial (constant expressions), but the list may contain replacement clashes, like so: , Assuming single character changes, use str.translate (for python 3):
code :
>>> str.translate('grab my cat', str.maketrans(reps))
'grbc my abt'
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