# \W : opposite to \w print(re.search(r"r\Wn", "r\nn r4n")) # <_sre.SRE_Match object; span=(0, 3), match='r\nn'> # \b : empty string (only at the start or end of the word) print(re.search(r"\bruns\b", "dog runs to cat")) # <_sre.SRE_Match object; span=...
# \W : opposite to \w 即与\w相反 res = re.search(r'r\Wn','r\nn r9n') print(res) >>> <re.Match object; span=(0, 3), match='r\nn'> 1. 2. 3. 4. 5. 6. 7. 8. 9. 6.匹配空白字符 \b and \B # \b : (only at the start or end of the word) res = re.sear...
recs = SeqIO.parse(gzip.open('SRR003265.filt.fastq.gz', 'rt', encoding='utf-8'), 'fastq') cnt_qual = defaultdict(int) for rec in recs: for i, qual in enumerate(rec.letter_annotations['phred_quality']): if i < 25: continue cnt_qual[qual] += 1 tot = sum(cnt_qual.values()...
obj not in s Non-membership test: is obj not an element of s?s = t Equality test: do s and t have exactly the same elements?s != t Inequality test: opposite of =s t (Strict) subset test; s !=t and all elements of s are members of ts.issub 40、set(t) s t (Strict) ...
Let us have our Turtle go to the exact opposite of the point 50,50 which is –50,50 and then again back home. t.goto(-50,50) t.home() When we’re done, we’ll get something like this (Figure 6-17). 图6-17 步骤3-完成第一个倾斜的正方形 我们有了第一个倾斜的正方形!耶!
\SMatches any character which is not a whitespace character. This is the opposite of \s. If theASCIIflag is used this becomes the equivalent of [^ \t\n\r\f\v] (but the flag affects the entire regular expression, so in such cases using an explicit [^ \t\n\r\f\v] may be a ...
The not in membership operator runs the opposite test as the in operator. It allows you to check whether an integer value is not in a collection of values: Python >>> 5 not in [2, 3, 5, 9, 7] False >>> 8 not in [2, 3, 5, 9, 7] True In the first example, you get...
This is another example of a race condition. Moving on to .set_message(), you can see the opposite side of the transaction. The producer will call this with a message. It will acquire the .producer_lock, set the .message, and the call .release() on then consumer_lock, which will ...
startswith and endswith - determine if there is a substring at the start and end of a string, respectively. To change the case of a string, you can use lower and upper. The method split is the opposite of join, turning a string with a certain separator into a list. Some examples: ...
It might help to remember—join() is the opposite of split(). >>> marxes = ['Groucho', 'Chico', 'Harpo'] >>> ', '.join(marxes) 'Groucho, Chico, Harpo' 15. Reorder items with sort() or sorted() 16.Get length with len() 17.assign with= 18.Copy with copy(), list(), or...