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POCSV calulation script not saving the correct amount of columns
 

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  1. POCSV calulation script not saving the correct amount of columns
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    <p>@Stackoverflow</p> <p>I have a script that adds three columns to the end of my csv based on matching 3 criteria. </p> <p>I understand the problem, is that the code is re-reading line from rdr and that wrt is the modified line, after the initial loop I tried to iterate through wrt, but the code was unable to do that.</p> <h3>My code:</h3> <pre><code>import csv import datetime import copy from collections import defaultdict with open(r"FullMergedData.csv") as i, open(r"FullMergedDataWSPSR.csv", "wb") as o: rdr = csv.reader(i, delimiter ="|") wrt = csv.writer(o, delimiter ="|") data, currdate = defaultdict(lambda:[0, 0, 0, 0]), None calclist = [6, 7, 19, 23, 25, 26, 35, 62, 64] for calc in calclist: for counter2, line in enumerate(rdr): if counter2 != 0: date, name = datetime.datetime.strptime(line[50], '%d/%m/%Y'), line[calc] if date != currdate or not currdate: for v in data.itervalues(): v[:2] = v[2:] currdate = date top,bottom = data[name][0:2] try: quotient = float(top)/bottom except ZeroDivisionError: quotient = 0 wrt.writerow(line + data[name][:2]+ [quotient]) data[name][3] += 1 if line[38] == "1": data[name][2] += 1 </code></pre> <p>If anyone can help with getting this code to work I would be very appreciative. Many thanks AEA</p> <h3>Code that produces traceback</h3> <pre><code>import csv import datetime import copy from collections import defaultdict with open(r"FullMergedData.csv") as i, open(r"FullMergedDataWSPSR.csv", "wb") as o: rdr = csv.reader(i, delimiter ="|") wrt = csv.writer(o, delimiter ="|") data, currdate = defaultdict(lambda:[0, 0, 0, 0]), None calclist = [6, 7, 19, 23, 25, 26, 35, 62, 64] for counter, calc in enumerate(calclist): if counter == 0: for counter2, line in enumerate(rdr): if counter2 != 0: date, name = datetime.datetime.strptime(line[50], '%d/%m/%Y'), line[calc] if date != currdate or not currdate: for v in data.itervalues(): v[:2] = v[2:] currdate = date top,bottom = data[name][0:2] try: quotient = float(top)/bottom except ZeroDivisionError: quotient = 0 wrt.writerow(line + data[name][:2]+ [quotient]) data[name][3] += 1 if line[38] == "1": data[name][2] += 1 else: for line in wrt: date, name = datetime.datetime.strptime(line[50], '%d/%m/%Y'), line[calc] if date != currdate or not currdate: for v in data.itervalues(): v[:2] = v[2:] currdate = date top,bottom = data[name][0:2] try: quotient = float(top)/bottom except ZeroDivisionError: quotient = 0 wrt.writerow(line + data[name][:2]+ [quotient]) data[name][3] += 1 if line[38] == "1": data[name][2] += 1 </code></pre> <h3>Traceback</h3> <pre><code>Traceback (most recent call last): File "C:\mergecalculator.py", line 35, in &lt;module&gt; for line in wrt: TypeError: '_csv.writer' object is not iterable </code></pre>
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    1. USAEA
    1. USAEA
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COWhat error are you seeing? Can you post a traceback?
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      1. POCSV calulation script not saving the correct amount of columns
      1. USSunPowered
    2. CO@SunPowered added code of what I tried + traceback
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      1. POCSV calulation script not saving the correct amount of columns
      1. USAEA
    3. COWhy are you iterating over a writer object? What are you trying to do with `for line in wrt:`?
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      1. POCSV calulation script not saving the correct amount of columns
      1. USBrionius
 

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